Bachmeier, B.E., P. Boukamp, R. Lichtinghagen, et al. "Matrix Metalloproteinases-2, -3, -7, -9 and -10, But Not MMP-11, Are Differentially Expressed in Normal, Benign Tumorigenic and Malignant Human Keratinocyte Cell Lines" Biological Chemistry, 381.5-6 (2005): 497-507. Retrieved 23 May. 2013, from doi:10.1515/BC.2000.064

Bachmeier, B., Boukamp, P., Lichtinghagen, R., et al. (2005). Matrix Metalloproteinases-2, -3, -7, -9 and -10, But Not MMP-11, Are Differentially Expressed in Normal, Benign Tumorigenic and Malignant Human Keratinocyte Cell Lines. Biological Chemistry, 381(5-6), pp. 355-529. Retrieved 23 May. 2013, from doi:10.1515/BC.2000.064

Bachmeier, B.E., P. Boukamp, R. Lichtinghagen, et al. 2005. Matrix Metalloproteinases-2, -3, -7, -9 and -10, But Not MMP-11, Are Differentially Expressed in Normal, Benign Tumorigenic and Malignant Human Keratinocyte Cell Lines. Biological Chemistry. 381(5-6): 355-529. Retrieved 23 May. 2013, from doi:10.1515/BC.2000.064