@article{article0b219d0c,
title   = {Scanning electron microscopic observations of the enamel surface before and after etching by orthophosphoric acid},
author = {Fava, M and Watanabe, Ii-Sei and Fava-de-Moraes, Flávio},
year = {1994},
journal   = {Revista de Odontologia da Unesp}
}