@article{04115507,
title = {A topological lattice on the set of multifunctions.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {12},
year = {1989},
pages = {665-668},
doi = {10.1155/S0161171289000815},
zbl = {0681.54010},
language = {en},
url = {http://dml.mathdoc.fr/item/04115507}
}
Papadopoulos, Basil K. A topological lattice on the set of multifunctions.. International Journal of Mathematics and Mathematical Sciences, Tome 12 (1989) pp. 665-668. doi : 10.1155/S0161171289000815. http://gdmltest.u-ga.fr/item/04115507/