IEEE Internet Computing: Security Track - Public Key Infrastructures that Satisfy Security Goals. - William T. Polk; Nelson E. Hastings; Ambarish Malpani (IEEE Distributed Syst. Online, 2003)

Public Key Infrastructures that Satisfy Security Goals. - William T. Polk; Nelson E. Hastings; Ambarish Malpani (IEEE Internet Comput., 2003)

Memorandum for Multi-Domain Public Key Infrastructure Interoperability. - Masaki Shimaoka; Nelson E. Hastings; Rebecca Nielsen (RFC, 2008)