Template:De Lange, 1998
- de Lange, P.J. 1998: Pittosporum ellipticum subsp. serpentinum (Pittosporaceae) -a new ultramafic endemic from the Surville Cliffs, North Cape, New Zealand. New Zealand journal of botany, 36(3): 389–397. DOI: 10.1080/0028825X.1998.9512577