TY  - JOUR
AU  - S. Stańko
TI  - On existence theorems for some class of non-linear Tchebycheff approximations
JO  - Commentationes Mathematicae
PY  - 1969
SP  -  301
EP  - 304
VL  - 12
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.14708/cm.v12i2.5152/
DO  - 10.14708/cm.v12i2.5152
LA  - pl
ID  - 10_14708_cm_v12i2_5152
ER  -