Schaper, C. 2026. The Source Duality: Endogenous and Exogenous Preparation of the Substituted-Chrysene Stock, Mixed Arm Words, and the Persistence Semigroup. Annals of the Chrysene Formalism. 1, 4 (Nov. 2026), 1823–1835. DOI:https://doi.org/10.68366/2tp1jv23.