Austin Tate, [http://www.aiai.ed.ac.uk/project/oplan/documents/1996/96-aiia-plan-ontology.pdf Towards a Plan Ontology] (1996)

Austin Tate [http://www.aiai.ed.ac.uk/~bat/ontology.html Plan Ontology Page]

[http://www.aiai.ed.ac.uk/~arpi/spar/DOCS/spar-0.1-30oct97.html Planning Initiative Shared Planning and Activity Representation - SPAR] (1997)

Philip R. Cohen and C. Raymond Perrault, [https://www.cs.rochester.edu/~kautz/Courses/577autumn2007/elements_of_plan_based_theory_speech_acts_cohen.pdf Elements of a Plan‐Based Theory of Speech Acts] (1979)
:Summarized [http://www.ling.uni-potsdam.de/~garoufi/teaching/planung/06-CohenPerrault.pdf here]

[http://www.ai.sri.com/~act/ Act Editor: Procedural Knowledge Browser/Editor]

[http://www.esri.com/industries/defense/military_ops ESRI: Military Operations]