@Misc{BVMC:702344,
author = {Regiomontanus, Johannes},
title = {In Ptolemaei Magnam compositionem, quam Almagestum vocant, libri tredecim},
url = {http://www.cervantesvirtual.com/obra/in-ptolemaei-magnam-compositionem-quam-almagestum-vocant-libri-tredecim-0}
}