@article{De Souza_2005 author = {C. A. De Souza and Evariste Sanchez-Palencia}, title = {Complexification in Sensitive Singular Perturbations and Their Appproximation}, journal = {International Journal for Multiscale Computational Engineering}, issn = {1543-1649}, year = {2005}, volume = {3}, number = {4}, pages = {481--498} }