Petrus de Alvernia, Sententia super librum 'De vegetabilibus et plantis'

Poortman, E.l.j 2003 Brill Book Archive Part 1, ISBN: 9789004472495 , Vol. 13 ( Serie ) Leiden; Boston : BRILL 9789004453340 | 9789004117662 | BRILL9789004453340