A hybrid algorithm for the solution of a single commodity spatial equilibrium model. - Luis F. Portugal; Joaquim Júdice (Comput. Oper. Res., 1996)

An Investigation of Interior-Point Algorithms for the Linear Transportation Problem. - Luis F. Portugal; Frederico Machado Bastos; Joaquim Júdice; José M. P. Paixão; Tamás Terlaky (SIAM J. Sci. Comput., 1996)

A truncated primal-infeasible dual-feasible network interior point method. - Luis F. Portugal; Mauricio G. C. Resende; Geraldo Veiga; Joaquim Júdice (Networks, 2000)

A Study of Preconditioners for Network Interior Point Methods. - Joaquim João Júdice; João Patrício; Luis F. Portugal; Mauricio G. C. Resende; Geraldo Veiga (Comput. Optim. Appl., 2003)