@inbook{inbook75344b29,
title   = {The perception of gravity in the mad house: an analysis based in Gaston Bachelard's epistemology},
author = {Silva, Cibelle Celestino and Colombo Junior, Pedro D.},
year = {2013},
publisher = {Flensburg University Press},
journal   = {Enabling scientific understanding through historical instruments and experiments in formal and non formal learning environments}
}