TY - JOUR AU - A. S. Vernitskiǐ AU - M. V. Volkov TI - A proof and generalization of the Higgins theorem on divisors of semigroups of isotonic transformations JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1995 SP - 38 EP - 44 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1995_1_a2/ LA - ru ID - IVM_1995_1_a2 ER -