TY - JOUR TI - Recenze JO - Applications of Mathematics PY - 1980 SP - 229 EP - 233 VL - 25 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.21136/AM.1980.103854/ DO - 10.21136/AM.1980.103854 LA - cs ID - 10_21136_AM_1980_103854 ER -