Superficial Collagen Fibril Modulus and Pericellular Fixed Charge Density Modulate Chondrocyte Volumetric Behaviour in Early Osteoarthritis. - Petri Kalevi Tanska; Siru M. Turunen; Sang Kuy Han; Petro Julkunen; Walter Herzog; Rami K. Korhonen (Comput. Math. Methods Medicine, 2013)