@article{00701123,
title = {Logics with two types of integral operators.},
journal = {Publications de l'Institut Math\'ematique. Nouvelle S\'erie},
volume = {53(67)},
year = {1993},
pages = {18-24},
zbl = {0810.03031},
language = {en},
url = {http://dml.mathdoc.fr/item/00701123}
}
Đorđević, Radosav S. Logics with two types of integral operators.. Publications de l'Institut Mathématique. Nouvelle Série, Tome 53(67) (1993) pp. 18-24. http://gdmltest.u-ga.fr/item/00701123/