TY - JOUR AU - Phuapong, Sarawut AU - Leeratanavalee, Sorasak TI - Pre-strongly solid varieties of commutative semigroups JO - Discussiones Mathematicae. General Algebra and Applications PY - 2011 SP - 27 EP - 45 VL - 31 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DMGAA_2011_31_1_a1/ LA - en ID - DMGAA_2011_31_1_a1 ER -