TY - JOUR AU - O. I. Tsarkov TI - Endomorphisms of the semigroup $G_2(R)$ over partially ordered commutative rings without zero divisors and with~$1/2$ JO - Fundamentalʹnaâ i prikladnaâ matematika PY - 2013 SP - 181 EP - 204 VL - 18 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FPM_2013_18_1_a10/ LA - ru ID - FPM_2013_18_1_a10 ER -