1. Schlenoff C, Gruninger M, Tissot F, Valois J, Lubell J, Lee J (1995) The Process Specification Language (PSL) overview and version 1.0 specification. http://www.nist.gov/psl , accessed 6 June 2005
2. PSL Ontology—Current theories and extensions (version 2.5). www.mel.nist.gov/psl/psl-ontology , accessed 28 March 2008
3. Schlenoff C, Gruninger M, Ciocoiu M, Lee J (2000) The essence of the process specification language. National Institute of Standards and Technology
4. Qiao LH, Liu W (2009) Agile manufacturing data management. Key Eng Mater 407-408:189–193
5. Knutilla A, Schlenoff C, Ray S, Polyak S, Tate A, Cheah S, Anderson R (1998) Process Specification Language: an analysis of existing representations. National Institute of Standards and Technology