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  interhash = {68bc453b63e41a469f5c566e241986e0},
  intrahash = {78b8c939590dc5d30f4016126c693a46},
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  year = 2002
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@book{clifford61,
  address = {Providence, Rhode Island},
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@phdthesis{konieczny92,
  address = {University Park, PA},
  author = {Konieczny, Janusz},
  interhash = {60bdd44499692bb4fd980a3c056ca9a4},
  intrahash = {5b9baadb9546877d03df5fa7751433d3},
  school = {The Pennsylvania State University},
  title = {Semigroups of binary Relations},
  year = 1992
}

@article{schein76,
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  interhash = {f569baaa08e9eab441e3786c088193dd},
  intrahash = {6790c6e1d10a6b12b5556342a9681413},
  journal = {Semigroup Forum},
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  year = 1976
}

@article{gregory81,
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  interhash = {48219154b23d9f15a5fb30e20788a117},
  intrahash = {15e03da7f049d633a94ed3c31f5df318},
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  pages = {119-134},
  publisher = {American Elsevier Publications},
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  year = 1981
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@inproceedings{gregory80,
  author = {de Caen, D. and Gregory, D. A.},
  booktitle = {Combinatorial Mathematics VII},
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  intrahash = {01f267760b923038eb45e844ce3cb27f},
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  series = {Lecture Notes in Mathematics},
  title = {Prime boolean matrices},
  volume = 829,
  year = 1980
}

@article{green51,
  author = {Green, J. A.},
  interhash = {15229d909dc6551acf14935bf451728e},
  intrahash = {94b524a0c52a252f13bd3024c14bc24f},
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@article{plemmons70,
  author = {Plemmons, R. J. and West, M. T.},
  interhash = {307a57a63944ca1e3db479bc0ebc1799},
  intrahash = {253e1239891456fa4c67c07b95e62ed3},
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  pages = {743-753},
  title = {On the semigroup of binary relations},
  volume = 35,
  year = 1970
}

@article{kim77,
  author = {Kim, Ki Hang and Roush, Fred W.},
  interhash = {5402dcb70c2d6c7be7d4484007dea01b},
  intrahash = {d2d1fec9d882488deb71b3c165a48826},
  journal = {Semigroup Forum},
  pages = {29-32},
  title = {On generating regular elements in the semigroup of binary relations},
  volume = 14,
  year = 1977
}

@article{montague69,
  author = {Montague, J. S. and Plemmons, R. J.},
  interhash = {5c420ea16daeb1d8ac737a77bed3a51a},
  intrahash = {74a0526ce6e2a4fe8e2f0d17dc7caf5d},
  journal = {Journal of Algebra},
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  title = {Maximal Subgroups of the Semigroup of Relations},
  volume = 13,
  year = 1969
}

@article{kim78,
  author = {Kim, Ki Hang and Roush, Fred W.},
  interhash = {a34d8099729a3e22f722cd308cbfe4af},
  intrahash = {69b3fdd33a53f4f32dd5d04d99e5b576},
  journal = {Linear Algebra and its Applications},
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  title = {Inverses of Boolean matrices},
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  year = 1978
}

@article{schein70,
  author = {Plemmons, R. J. and Schein, B. M.},
  interhash = {341ee2f65ff1940a18d395f2cf5eadd4},
  intrahash = {100395cf400ac7fa3109ce84ae9bcdb8},
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  volume = 1,
  year = 1970
}

@article{konieczny94,
  author = {Konieczny, Janusz},
  interhash = {2f0fc12a47ba98a11a2746376b118e48},
  intrahash = {133de67269c9bfa71bde2b7615f0c1b3},
  journal = {Semigroup Forum},
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  title = {Green's Equivalences in Finite Semigroups of Binary Relations},
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@mastersthesis{jaeschke2005struktur,
  author = {Jäschke, Robert},
  interhash = {e15113f443dfe1054256c34bd365a4ad},
  intrahash = {3cbe3059391ae0f543c448701949ddbc},
  school = {Technische Universität Dresden},
  title = {Die Struktur der Monoide binärer Relationen auf endlichen Mengen},
  type = {Diplomarbeit},
  url = {http://www.kde.cs.uni-kassel.de/pub/pdf/jaeschke2005struktur.pdf},
  year = 2005
}

@article{zaretski63,
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  interhash = {430f0d7da2f2497b1e17285ea9540ae4},
  intrahash = {89cada18428af1a3bba8a6e4efd8be16},
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@article{markowsky77,
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  journal = {Semigroup Forum},
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  year = 1977
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@book{kim82,
  address = {New York},
  author = {Kim, Ki Hang},
  interhash = {6803520dc4eba70ddbdcd51d3db68792},
  intrahash = {b3af264c7c0f425912d71be240e4fd1b},
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}

@article{yang69,
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  interhash = {3091b16dcb62c8a3e7cbe0e7505d7331},
  intrahash = {0ba5eb63a0676e360e42c305a9297c4a},
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  title = {A theorem on the semigroup of binary relations},
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}

@article{konieczny05,
  author = {Konieczny, Janusz},
  interhash = {b45742ab9ef8aa1421d9fd02db40dfa7},
  intrahash = {4092862e96f165222ba8beef4a6d461f},
  note = {to be published},
  title = {A Proof of {D}evadze's Theorem on Generators of the Semigroup of Boolean Matrices},
  year = 2005
}

@techreport{denes76,
  address = {Montgomery, Alabama},
  author = {Denes, J. and Kim, K. H. and Roush, F. W.},
  institution = {Alabama State University},
  interhash = {28296e01e11d6ddfe1b51feb4d78b9c9},
  intrahash = {9f81cc6dd933352e97e8e20861ef38ed},
  title = {A characterization of an inverse for semigroup elements},
  type = {Seminar Report},
  year = { 1976}
}