His first publication was New theory of the planets by his former teacher Peurbach and next, in 1474, his own calendar Kalendarium, and his Ephemerides which we referred to above.
Kanyang unang publikasyon ay Bagong teorya ng planets sa pamamagitan ng kanyang dating guro Peurbach at susunod na, sa 1474, ang kanyang sariling kalendaryo Kalendarium, at ang kanyang Ephemerides namin na-refer sa itaas.