van den Heuvel, E. P. J. (1966). "On the Precession as a Cause of Pleistocene Variations of the Atlantic Ocean Water Temperatures". Geophysical Journal International. Quyển 11 số 3. tr. 323–336. Bibcode:1966GeoJ...11..323V. doi:10.1111/j.1365-246X.1966.tb03086.x.
van den Heuvel, E. P. J. (1966). "On the Precession as a Cause of Pleistocene Variations of the Atlantic Ocean Water Temperatures". Geophysical Journal International. Quyển 11 số 3. tr. 323–336. Bibcode:1966GeoJ...11..323V. doi:10.1111/j.1365-246X.1966.tb03086.x.