TY  - JOUR
AU  - Háčik, Miloš
TI  - Some analogues for higher monotonicity of the Sonin-Butlewski-Pólya theorem
JO  - Mathematica slovaca
PY  - 1981
SP  - 291
EP  - 296
VL  - 31
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MASLO_1981__31_3_a6/
LA  - en
ID  - MASLO_1981__31_3_a6
ER  -