*Casanovas, Juan; "Early Observations of Sunspots: Scheiner and Galileo", in: 1st Advances in Solar Physics Euroconference, "Advances in the Physics of Sunspots", ASP Conference Series 118, B. Schmieder, J. C. del Toro Iniesta, M. Vásquez (Hg.
* Casanovas, Juan: "Early Observations of Sunspots: Scheiner and Galileo", στο: 1st Advances in Solar Physics Euroconference, "Advances in the Physics of Sunspots", ASP Conference Series 118, B. Schmieder, J. C. del Toro Iniesta, M. Vásquez (Hg.