TY - JOUR AU - R. BartoszyƄski TI - On a certain model of an epidemic JO - Applicationes Mathematicae PY - 1972 SP - 139 EP - 151 VL - 13 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/am-13-2-139-151/ DO - 10.4064/am-13-2-139-151 LA - en ID - 10_4064_am_13_2_139_151 ER -