@article{article7ff171a5,
title   = {Optical characterization of one‐dimensional porous silicon photonic crystals with effective refractive index gradient in depth},
author = {Huanca, Danilo Roque and Salcedo, Walter Jaimes},
year = {2015},
doi = {10.1002/pssa.201532063},
journal   = {Physica Status Solidi A Applications and Materials Science}
}