KULLBERG, J. C.; 						ROCHA, R. B..
Preamble.
<strong>Ciências da Terra / Earth Sciences Journal</strong>, [S.l.], v. 19, n. 1, p. 5-7, sep. 2017.
ISSN 2183-4431.
Available at: &lt;<a href="http://cienciasdaterra.novaidfct.pt/index.php/ct-esj/article/view/346" target="_new">http://cienciasdaterra.novaidfct.pt/index.php/ct-esj/article/view/346</a>&gt;. Date accessed: 06 dec. 2019.
doi: <a href="https://doi.org/10.21695/cterra/esj.v19i1.346">https://doi.org/10.21695/cterra/esj.v19i1.346</a>.