TY - JOUR AU - Zajíček L. TI - Onσ-porous sets in abstract spaces. JO - Abstract and Applied Analysis PY - 2005 SP - 509 EP - 534 VL - 2005 IS - 5 PB - mathdoc UR - https://geodesic-test.mathdoc.fr/articles/10.1155/AAA.2005.509/ DO - 10.1155/AAA.2005.509 LA - en ID - 10_1155_AAA_2005_509 ER -