TY - JOUR TI - Recense JO - Applications of Mathematics PY - 1975 SP - 222 EP - 226 VL - 20 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.21136/AM.1975.103586/ DO - 10.21136/AM.1975.103586 LA - cs ID - 10_21136_AM_1975_103586 ER -