Internet X.509 Public Key Infrastructure: Logotypes in X.509 Certificates. - Stefan Santesson; Russ Housley; Trevor Freeman (RFC, 2004)

Server-Based Certificate Validation Protocol (SCVP). - Trevor Freeman; Russell Housley; Ambarish Malpani; David Cooper; W. Timothy Polk (RFC, 2007)

Internet X.509 Public Key Infrastructure: Logotypes in X.509 Certificates. - Stefan Santesson; Russ Housley; Trevor Freeman; Leonard Rosenthol (RFC, 2023)