@Book{BVMC:628131,
author = {Neumann, Johann Friedrich Wilhelm von},
title = {Joh. Frid. Wilh. de Neumann ... De pactis et contractibus Principum commentatio},
url = {https://www.cervantesvirtual.com/obra/joh-frid-wilh-de-neumann--de-pactis-et-contractibus-principum-commentatio}
}