This paper is already published. The correct citation is Kietzmann, D.A., Blau, J., Fernández, D.E., and Palma, R.M. 2010. Crustacean microcoprolites from the Upper Jurassic – Lower Cretaceous of the Neuquén Basin, Argentina: Systematics and biostratigraphic implications // Acta Palaeontologica Polonica, Vol. 55, No. 2, p. 277-284.
pdf: http://www.app.pan.pl/archive/published/app55/app20090094.pdf
Best regards
Diego Kietzmann