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„PREMOG – Research”. How Lucy walked. Primate Evolution & Morphology Group (PREMOG), the Department of Human Anatomy and Cell Biology, the School of Biomedical Sciences at the University of Liverpool. 18. svibnja 2007.. Arhivirano iz originala na datum 2007-10-25. Pristupljeno 1. studenog 2007.
„PREMOG – Supplementry Info”. The Laetoli Footprint Trail: 3D reconstruction from texture; archiving, and reverse engineering of early hominin gait. Primate Evolution & Morphology Group (PREMOG), the Department of Human Anatomy and Cell Biology, the School of Biomedical Sciences at the University of Liverpool. 18. svibnja 2007.. Arhivirano iz originala na datum 2007-07-17. Pristupljeno 1. studenog 2007.
Thorpe S.K.S.; Holder R.L., and Crompton R.H. (24. svibnja 2007.). „PREMOG – Supplementry Info”. Origin of Human Bipedalism As an Adaptation for Locomotion on Flexible Branches. Primate Evolution & Morphology Group (PREMOG), the Department of Human Anatomy and Cell Biology, the School of Biomedical Sciences at the University of Liverpool. Arhivirano iz originala na datum 2007-07-17. Pristupljeno 1. studenog 2007.