TY - JOUR AU - Jakubík, Ján TI - Retract varieties of lattice ordered groups JO - Czechoslovak Mathematical Journal PY - 1990 SP - 104 EP - 112 VL - 40 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1990.102362/ DO - 10.21136/CMJ.1990.102362 LA - en ID - 10_21136_CMJ_1990_102362 ER -