Sager, P. (1969). Spondylosis cervicalis: A pathological and osteoarchaeological study of osteochondrosis intervertebralis cervicalis, arthrosis uncovertebralis, and spondylarthrosis cervicalis. Copenhagen.
Lua i Stíl Chicago (17ú heag.)Sager, Philip. Spondylosis Cervicalis: A Pathological and Osteoarchaeological Study of Osteochondrosis Intervertebralis Cervicalis, Arthrosis Uncovertebralis, and Spondylarthrosis Cervicalis. Munksgaard: Copenhagen, 1969.
Lua MLA (8ú heag.)Sager, Philip. Spondylosis Cervicalis: A Pathological and Osteoarchaeological Study of Osteochondrosis Intervertebralis Cervicalis, Arthrosis Uncovertebralis, and Spondylarthrosis Cervicalis. Copenhagen, 1969.
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