@article{02121233, title = {A multivalued fixed point theorem in ultrametric spaces.}, journal = {Matematichki Vesnik}, volume = {54}, year = {2002}, pages = {89-91}, zbl = {1069.47508}, language = {en}, url = {http://dml.mathdoc.fr/item/02121233} }
Gajić, Ljiljana. A multivalued fixed point theorem in ultrametric spaces.. Matematichki Vesnik, Tome 54 (2002) pp. 89-91. http://gdmltest.u-ga.fr/item/02121233/