Morrison, D. A., Trombe, M. C., Hayden, M. K., Waszak, G. A., & Chen, J. D. (1984). Isolation of transformation-deficient Streptococcus pneumoniae mutants defective in control of competence, using insertion-duplication mutagenesis with the erythromycin resistance determinant of pAM beta 1.

Morrison, D A., M C. Trombe, M K. Hayden, G A. Waszak, a J D. Chen. Isolation of Transformation-deficient Streptococcus Pneumoniae Mutants Defective in Control of Competence, Using Insertion-duplication Mutagenesis With the Erythromycin Resistance Determinant of PAM Beta 1. 1984.

Morrison, D A., et al. Isolation of Transformation-deficient Streptococcus Pneumoniae Mutants Defective in Control of Competence, Using Insertion-duplication Mutagenesis With the Erythromycin Resistance Determinant of PAM Beta 1. 1984.