Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Peter Koepke, Bernhard Schröder. ProofML - eine Annotationssprache für natürliche Beweise. LDV Forum, 18(1/2):428-441, 2003. [doi]