Rose, Kenneth D. (2006). "The postcranial skeleton of early Oligocene Leptictis (Mammalia: Leptictida), with preliminary comparison to Leptictidium from the middle Eocene of Messel". Palaeontographica Abteilung A. 278 (1–6): 37. Bibcode:2006PalAA.278...37R. doi:10.1127/pala/278/2006/37.
Gavin A. Schmidt & Drew T. Shindell; Shindell (2003). "Atmospheric composition, radiative forcing, and climate change as a consequence of a massive methane release from gas hydrates". Paleoceanography. 18 (1): n/a. Bibcode:2003PalOc..18.1004S. doi:10.1029/2002pa000757.
harvard.edu
ui.adsabs.harvard.edu
Rose, Kenneth D. (2006). "The postcranial skeleton of early Oligocene Leptictis (Mammalia: Leptictida), with preliminary comparison to Leptictidium from the middle Eocene of Messel". Palaeontographica Abteilung A. 278 (1–6): 37. Bibcode:2006PalAA.278...37R. doi:10.1127/pala/278/2006/37.
Gavin A. Schmidt & Drew T. Shindell; Shindell (2003). "Atmospheric composition, radiative forcing, and climate change as a consequence of a massive methane release from gas hydrates". Paleoceanography. 18 (1): n/a. Bibcode:2003PalOc..18.1004S. doi:10.1029/2002pa000757.
kenozoicum.nl
"Leptictidium". Leptictidium bij Kenozoicum.nl (in Dutch). Kenozoicum.nl. 2007. Archived from the original on 2007-09-09. Retrieved 2007-12-30.