TY - JOUR TI - Recense JO - Applications of Mathematics PY - 1972 SP - 69 EP - 72 VL - 17 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/AM.1972.103394/ DO - 10.21136/AM.1972.103394 LA - cz ID - 10_21136_AM_1972_103394 ER -