%0 Journal Article %A A. S. Vernitskiǐ %A M. V. Volkov %T A proof and generalization of the Higgins theorem on divisors of semigroups of isotonic transformations %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1995 %P 38-44 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1995_1_a2/ %G ru %F IVM_1995_1_a2