Burmeister, Peter ; Wojdylo, B. ; Czermak, J. (Bearb.) ; Eigenthaler, G. (Bearb.) ; Kaiser, H. K. (Bearb.) ; Müller, W. B. (Bearb.) ; Nöbauer, W. (Bearb.): Properties of homomorphisms and quomorphisms between partial algebras . 5 . In: Contributions to general algebra . Wien : H{\"o}lder--Pichler--Tempsky , 1987 , S. 71-90