Koonin, E. V., Makarova, K. S., Rogozin, I. B., Davidovic, L., Letellier, M., & Pellegrini, L. (2003). The rhomboids: A nearly ubiquitous family of intramembrane serine proteases that probably evolved by multiple ancient horizontal gene transfers. BioMed Central.

Koonin, Eugene V., Kira S. Makarova, Igor B. Rogozin, Laetitia Davidovic, Marie-Claude Letellier, and Luca Pellegrini. The Rhomboids: A Nearly Ubiquitous Family of Intramembrane Serine Proteases That Probably Evolved By Multiple Ancient Horizontal Gene Transfers. BioMed Central, 2003.

Koonin, Eugene V., et al. The Rhomboids: A Nearly Ubiquitous Family of Intramembrane Serine Proteases That Probably Evolved By Multiple Ancient Horizontal Gene Transfers. BioMed Central, 2003.