Kotajima S., Kishimoto K. N., Watanuki M., Hatori M. and Kokubun S. (2009) “Gene Expression Analysis of Ectopic Bone Formation Induced by Electroporatic Gene Transfer of BMP4”, Upsala Journal of Medical Sciences, 111(2), pp. 231–242. doi: 10.3109/2000-1967-044.