TY - JOUR AU - Andres, Jan TI - Periodic boundary value problem for certain nonlinear differential equations of the third order JO - Mathematica slovaca PY - 1985 SP - 305 EP - 309 VL - 35 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MASLO_1985__35_3_a12/ LA - en ID - MASLO_1985__35_3_a12 ER -