@article{Coello98a, author = {Carlos A. {Coello Coello} and Alan D. Christiansen}, journal = {Civil Engineering Systems}, key = {Coello \& Christiansen, 1998a}, title = {Two {N}ew {G}{A}-based methods for multiobjective optimization}, volume = {15}, number = {3}, pages = {207--243}, year = {1998} }