Hayward, Bruce W. (1979). "Eruptive history of the early to mid miocene Waitakere volcanic arc, and palaeogeography of the Waitemata Basin, Northern New Zealand". Journal of the Royal Society of New Zealand. 9 (3): 297–320. doi:10.1080/03036758.1979.10419410. ISSN0303-6758.
Hayward, Bruce W. (1979). "Eruptive history of the early to mid miocene Waitakere volcanic arc, and palaeogeography of the Waitemata Basin, Northern New Zealand". Journal of the Royal Society of New Zealand. 9 (3): 297–320. doi:10.1080/03036758.1979.10419410. ISSN0303-6758.