Union List of Artists Names Online, sitio web, 13 febrero 2015: (Altdorfer, Albrecht (German painter and printmaker, ca. 1480-1538) Note: As an exponent of the Danube School, Altdorfer was indifferent to Italian Renaissance concerns for perspective and proportion. Instead he favored emotion and expressiveness, particularly in his depiction of landscapes and nature, which often dominates human forms in his paintings and prints. Names: Altdorfer, Albrecht; Albrecht Altdorfer; Altdorffer, Albrecht) http://www.getty.edu/vow/ULANFullDisplay?find=Altdorfer%2C+Albrecht&role=&nation=&prev_page=1&subjectid=500031250

RKD artists, sitio web, 13 diciembre 2016: (Albrecht Altdorfer, male / German architect, engraver (printmaker), painter, draftsman. Born: Altdorf, Niederbayern, ca. 1480; Deceased: Regensburg, 1538-02-12) https://rkd.nl/explore/artists/1354