@article{article3edadb79,
title   = {Estimation of optical parameters of very thin films},
author = {Birgin, Ernesto Julian Goldberg and Chambouleyron, Ivan Emílio and Martínez, José Mário and Ventura, S. D.},
year = {2003},
doi = {10.1016/s0168-9274(03)00055-2},
journal   = {Applied Numerical Mathematics}
}