Development of noninvasive method of measuring copper and zinc by passive diffusion: an in vitro modelQueenie Charisse Landrito, Gianina Krisha Rodymae Menor, Fortunato Sevilla III, Leah Tolosa and Cristina TiangcoMATEC Web Conf., 268 (2019) 01008DOI: https://doi.org/10.1051/matecconf/201926801008