TY - JOUR AU - J. Płonka TI - On groups in which idempotent reducts form a chain JO - Colloquium Mathematicum PY - 1974 SP - 87 EP - 91 VL - 29 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm-29-1-87-91/ DO - 10.4064/cm-29-1-87-91 LA - en ID - 10_4064_cm_29_1_87_91 ER -