Pentikäinen, et al.. "RKKH" Peptides from the Snake Venom Metalloproteinase Ofbothrops Jararacabind Near the Metal Ion-dependent Adhesion Site of the Human Integrin Α2i-domain. no. 44, American Society for Biochemistry & Molecular Biology (ASBMB), Oct. 1999, doi:10.1074/jbc.274.44.31493.