TY - JOUR TI - Recense JO - Applications of Mathematics PY - 1977 SP - 229 EP - 236 VL - 22 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.21136/AM.1977.103695/ DO - 10.21136/AM.1977.103695 LA - cs ID - 10_21136_AM_1977_103695 ER -