TY - JOUR AU - Tadeusz Świątkowski TI - On the conditions of monotonicity of functions JO - Fundamenta Mathematicae PY - 1966 SP - 189 EP - 201 VL - 59 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-59-2-189-201/ DO - 10.4064/fm-59-2-189-201 LA - en ID - 10_4064_fm_59_2_189_201 ER -