@article{GDZPPN002538113,
title = {On one estimation problem.},
journal = {Publications de l'Institut Math\'ematique [Elektronische Ressource]},
volume = {40},
year = {1979},
pages = {69-78},
zbl = {0434.60036},
url = {http://dml.mathdoc.fr/item/GDZPPN002538113}
}
Bulatovic, J.; Janjic, S. On one estimation problem.. Publications de l'Institut Mathématique [Elektronische Ressource], Tome 40 (1979) pp. 69-78. http://gdmltest.u-ga.fr/item/GDZPPN002538113/