Kammoun, Manel, 		Derbel, Houda, AND 		Jarboui, Bassem.
" TWO META-HEURISTICS FOR SOLVING THE MULTI-VEHICLE MULTI-COVERING TOUR PROBLEM WITH A CONSTRAINT ON THE NUMBER OF VERTICES" <em>Yugoslav Journal of Operations Research</em> [Online], Volume 31 Number 3 (18 June 2020)