Article Serrano, Juan D. (2013)
Trying Ursus: A Reappraisal of the Tycho-Ursus Priority Dispute. Journal for the History of Astronomy (pp. 17-46). (/isis/citation/CBB001252569/) unapi

Book Nicolaus Reimers Ursus; Caspar Thierfelder; Dieter Launert (2012)
Astronomischer Grund: Fundamentum Astronomicum 1588 des Nicolaus Reimers Ursus. (/isis/citation/CBB914079939/) unapi

Essay Review Di Liscia, Daniel A. (2010)
Text, Context, and Conflict in Early Modern Cosmology. Isis: International Review Devoted to the History of Science and Its Cultural Influences. (/isis/citation/CBB001021224/) unapi

Essay Review Andrea Gualandi (2009)
L'astronomo e il filologo, l'onore e le fonti: Keplero arbitro nella sfida tra Tycho e Ursus. Galilæana: Journal of Galilean Studies. (/isis/citation/CBB347277858/) unapi

Chapter Launert, Dieter (2009)
Le système du monde de Nicolas Raimar Ursus comparé à ceux de Brahe et Roeslin. In: Nouveau Ciel, Nouvelle Terre: La révolution copernicienne dans l'Allemagne de la Réforme (1530--1630) (p. 155). (/isis/citation/CBB000953693/) unapi

Book Jardine, Nicholas; Segonds, Alain Philippe (2008)
La guerre des astronomes: la querelle au sujet de l'origine du système géo-héliocentrique à la fin du XVIe siècle. (/isis/citation/CBB001021225/) unapi

Book Copernicus, Nicolaus; Ursus, Nicholas Reimers; Kühne, Andreas; et al. (2007)
De revolutionibus: die erste deutsche Übersetzung in der Grazer Handschrift. (/isis/citation/CBB000930162/) unapi

Article Jardine, Nicholas (2006)
Kepler as Castigator and Historian: His Preparatory Notes for Contra Ursum. Journal for the History of Astronomy (p. 257). (/isis/citation/CBB000670910/) unapi

Chapter Jardine, Nick (2005)
The Many Significances of Kepler's Contra Ursum. In: Miscellanea Kepleriana: Festschrift für Volker Bialas zum 65. Geburtstag (p. 129). (/isis/citation/CBB000773691/) unapi

Article Jardine, Nicholas; Harloe, Katherine; Launert, Dieter; et al. (2005)
Tycho v. Ursus: The Build-Up to a Trial, Part 2. Journal for the History of Astronomy (p. 125). (/isis/citation/CBB000773462/) unapi

Article Jardine, Nicholas; Launert, Dieter; Segonds, Alain; et al. (2005)
Tycho v. Ursus: The Build-up to a Trial, Part 1. Journal for the History of Astronomy (p. 81). (/isis/citation/CBB000500484/) unapi

Article Mosley, Adam; Jardine, Nicholas; Tybjerg, Karin (2003)
Epistolary Culture, Editorial Practices, and the Propriety of Tycho's Astronomical Letters. Journal for the History of Astronomy (p. 421). (/isis/citation/CBB000773454/) unapi

Book Granada, Miguel A. (1996)
El debate cosmológico en 1588: Bruno, Brahe, Rothmann, Ursus, Röslin. (/isis/citation/CBB000068774/) unapi

Book Rosen, Edward (1986)
Three imperial mathematicians: Kepler trapped between Tycho Brahe and Ursus. (/isis/citation/CBB000033105/) unapi