Banbula, A., Bugno, M., Goldstein, J., Yen, J., Nelson, D., Travis, J., & Potempa, J. (2000). Emerging Family of Proline-Specific Peptidases of Porphyromonas gingivalis: Purification and Characterization of Serine Dipeptidyl Peptidase, a Structural and Functional Homologue of Mammalian Prolyl Dipeptidyl Peptidase IV. Infect Immun.

Banbula, Agnieszka, Marcin Bugno, Jason Goldstein, Jane Yen, Daniel Nelson, James Travis, and Jan Potempa. "Emerging Family of Proline-Specific Peptidases of Porphyromonas Gingivalis: Purification and Characterization of Serine Dipeptidyl Peptidase, a Structural and Functional Homologue of Mammalian Prolyl Dipeptidyl Peptidase IV." Infect Immun 2000.

Banbula, Agnieszka, et al. "Emerging Family of Proline-Specific Peptidases of Porphyromonas Gingivalis: Purification and Characterization of Serine Dipeptidyl Peptidase, a Structural and Functional Homologue of Mammalian Prolyl Dipeptidyl Peptidase IV." Infect Immun 2000.