1) Saida, K. and Nonomura, Y.: Characteristics of Ca2+-and Mg2+-induced tension development in chemically skinned smooth muscle fibers. J. Gen. Physiol. 72, 1 ?? 14 (1978)
2) Iino, M.: Tension responses of chemically skinned fibre bundles of the guinea-pig taenia caeci under varied ionic environments. J. Physiol. 320, 449 ?? 467 (1981)