@article{Wille95b, author = {Wille, Rudolf}, interhash = {c5223bed0a0995c5f3cd8962a9d54212}, intrahash = {f24cf862d804127a50bf6967a08276c3}, journal = {Order}, organisation = {Simon Fraser University}, pages = {149-158}, title = {The basic theorem of triadic concept analysis}, volume = 12, year = 1995 }