TY  - JOUR
AU  - Paulina Pych
TI  - On some linear operators defined by double integrals
JO  - Annales Polonici Mathematici
PY  - 1968
SP  - 231
EP  - 244
VL  - 20
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-20-3-231-244/
DO  - 10.4064/ap-20-3-231-244
LA  - en
ID  - 10_4064_ap_20_3_231_244
ER  -