TY - JOUR TI - Recense JO - Applications of Mathematics PY - 1972 SP - 234 EP - 242 VL - 17 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/AM.1972.103412/ DO - 10.21136/AM.1972.103412 LA - cz ID - 10_21136_AM_1972_103412 ER -