@article{04029235,
title = {Multifacility location problems on a sphere.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {10},
year = {1987},
pages = {583-596},
doi = {10.1155/S0161171287000693},
zbl = {0632.90022},
language = {en},
url = {http://dml.mathdoc.fr/item/04029235}
}
Aykin, Turgut; Babu, A.J.G. Multifacility location problems on a sphere.. International Journal of Mathematics and Mathematical Sciences, Tome 10 (1987) pp. 583-596. doi : 10.1155/S0161171287000693. http://gdmltest.u-ga.fr/item/04029235/