TY - JOUR TI - Recenze JO - Applications of Mathematics PY - 1981 SP - 389 EP - 400 VL - 26 IS - 5 UR - http://geodesic.mathdoc.fr/articles/10.21136/AM.1981.103927/ DO - 10.21136/AM.1981.103927 LA - cs ID - 10_21136_AM_1981_103927 ER -