@Misc{BVMC:760473,
author = {Regiomontanus, Johannes},
title = {Aureus hic liber est: non est preciosior ulla Ge[m]ma  kalendario},
url = {https://www.cervantesvirtual.com/obra/aureus-hic-liber-est-non-est-preciosior-ulla-gemma--kalendario}
}