TY - JOUR AU - Jakubíková-Studenovská, Danica TI - Two types of retract irreducibility of connected monounary algebras JO - Mathematica Bohemica PY - 1996 SP - 143 EP - 150 VL - 121 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/MB.1996.126097/ DO - 10.21136/MB.1996.126097 LA - en ID - 10_21136_MB_1996_126097 ER -