TY - JOUR AU - G. Grätzer AU - S. Whitney TI - Infinitary varieties of structures closed under the formation of complex structures JO - Colloquium Mathematicum PY - 1984 SP - 1 EP - 5 VL - 48 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm-48-1-1-5/ DO - 10.4064/cm-48-1-1-5 LA - en ID - 10_4064_cm_48_1_1_5 ER -