Hagiwara Y., Saijo Y., Chimoto E., Akita H., Sasano Y., Matsumoto F., and Kokubun S. “Increased Elasticity of Capsule After Immobilization in a Rat Knee Experimental Model Assessed by Scanning Acoustic Microscopy”. Upsala Journal of Medical Sciences, vol. 111, no. 3, July 2009, pp. 303–313, doi:10.3109/2000-1967-054.