Risteli, Juha, Seija Niemi, Saila Kauppila, Jukka Melkko, and Leila Risteli. 1995. “Collagen Propeptides As Indicators of Collagen Assembly”. Acta Orthopaedica 66 (sup266):183-88. https://doi.org/10.3109/17453679509157688.