Poussa, Mikko, Jens Rubak, and Veijo Ritsilä. “Differentiation of the Osteochondrogenic Cells of the Periosteum in Chondrotrophic Environment”. Acta Orthopaedica 52, no. 3 (January 1, 1981): 235–239. Accessed May 3, 2026. https://actaorthop.org/actao/article/view/28816.