Citing a paper
The way to cite a paper published in the SPICA Workshop proceedings is the following:
author(s), title, in SPICA joint European/Japanese Workshop, [number of the article], 2009, edited by A.M. Heras, B.M. Swinyard, K.G. Isaak and J.R. Goicoechea, published by EDP Sciences (spica.edpsciences.org), [DOI of the article].