American Psychological Association 6th edition

Ulungu, E. L., & Teghem, J. (n.d.). The two phases method: An efficient procedure to solve bi-objective combinatorial optimization problems.

ISO-690 (author-date, English)

ULUNGU, E. L. and TEGHEM, Jacques, [no date]. The two phases method: An efficient procedure to solve bi-objective combinatorial optimization problems. .

Modern Language Association 9th edition

Ulungu, E. L., and J. Teghem. The Two Phases Method: An Efficient Procedure to Solve Bi-Objective Combinatorial Optimization Problems.

Mohr Siebeck - Recht (Deutsch - Österreich)

Ulungu, E. L./Teghem, Jacques: The two phases method: An efficient procedure to solve bi-objective combinatorial optimization problems,

Emerald - Harvard

Ulungu, E.L. and Teghem, J. (n.d.). “The two phases method: An efficient procedure to solve bi-objective combinatorial optimization problems”.

Warning: These citations may not always be 100% accurate.