Template:Willumsen, 2012
- Willumsen, P.S. 2012: Three new species of dinoflagellate cyst from Cretaceous–Paleogene (K-Pg) boundary sections at mid-Waipara River and Fairfield Quarry, South Island, New Zealand. Palynology 36(supplement 1): 48-62. DOI: 10.1080/01916122.2011.642260
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