The Founder and author of SPT took many of the early LPs from his general knowledge of investigating systems himself. Further research merely looked at the general systems literature since about 1950 and two science journals to find LP’s. They also have covered the many texts or books that have been published on each of the more recognized isomorphies, such as those on fractals, chaos, feedback, self-organization, self-criticality, etc. The result has been two major formats for the early Linkage Propositions, the latter more formal and documented than the former.

• Early Format Linkage Propositions
• Late Format Linkage Propositions