TY  - JOUR
AU  - Krzysztof J. Szajowski
TI  - Main Issue Cover
JO  - Mathematica Applicanda
PY  - 2019
SP  -  1
EP  - 2
VL  - 47
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.14708/ma.v47i1.6508/
DO  - 10.14708/ma.v47i1.6508
LA  - pl
ID  - 10_14708_ma_v47i1_6508
ER  -