TY  - JOUR
AU  - Andrzej Pelczar
TI  - Some generalizations of the retract theorem
of T. Ważewski with applications to ordinary
and partial differential equations of the first order
JO  - Annales Polonici Mathematici
PY  - 1974
SP  - 15
EP  - 59
VL  - 29
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-29-1-15-59/
DO  - 10.4064/ap-29-1-15-59
LA  - en
ID  - 10_4064_ap_29_1_15_59
ER  -