TY - JOUR TI - Upozornění JO - Applications of Mathematics PY - 1965 VL - 10 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/AM.1965.102993/ DO - 10.21136/AM.1965.102993 LA - cz ID - 10_21136_AM_1965_102993 ER -