1. Low-latitude coccolith biostratigraphic zonation;Bukry,1973
2. Coccolith and silicoflagellate stratigraphy, Northwestern Pacific Ocean, Deep Sea Drilling Project Leg 32;Bukry,1975
3. Standard Paleogene calcareous nannoplankton zonation;Martini;Nature,1970
4. Standard Tertiary and Quaternary calcareous nannoplankton zonation;Martini,1971
5. Zonation of the Paleocene—Lower Eocene interval;Mohler;Gulf Coast Assoc. Geol. Soc. Trans.,1967