BioStor
 | Additional notes on the genus Petrea. VII H N Moldenke (1979) Phytologia 42: 292-318 |
 | Additional notes on the genus Petrea. VIII H N Moldenke (1979) Phytologia 42: 470-494 |
 | A sixth summary of the Verbenaceae, Avicenniaceae, Stilbaceae, Chloanthaceae, Symphoremaceae, Nyctanthaceae, and Eriocaulaceae of the world as to valid taxa, geographic distribution and synonymy. Supplement 2 H N #moldenke (1982) Phytologia 52: 110-129 |
 | Lectotypifications in the genus Petrea (Verbenaceae) R M Rueda (1993) Novon 3: 179-181 |
 | Systematics and Evolution of the Genus Petrea (Verbenaceae) Ricardo M Rueda (1994) Annals of the Missouri Botanical Garden 81: 610-652 |