Copy and paste this citation
ABRAHAM D. FLAXMAN,
ALAN M. FRIEZE
and JUAN CARLOS VERA
(2007).
On the Average Case Performance of Some Greedy Approximation Algorithms For the Uncapacitated Facility Location Problem. Combinatorics, Probability and Computing,
16
,
pp 713-732
doi:10.1017/S096354830600798X