Analysis of the contraction of fibroblast-collagen gels and the traction force of individual cells by a novel elementary structural model. - Z. Feng; Y. Wagatsuma; S. Kobayashi; Tadashi Kosawada; Daisuke Sato; Takao Nakamura; Tatsuo Kitajima; Mitsuo Umezu (EMBC, 2013)