Langouche, F., Roekaerts, D., & Tirapegui, E. (1980). Comment On Functional-integration and the Onsager-machlup Lagrangian in Riemannian Geometries. Physical review. A, Atomic, molecular, and optical physics, 21(4), 1344-1346. https://doi.org/10.1103/PhysRevA.21.1344 (Original work published 1980)