Sakhr , Jamal and A. Chronik , Blaine. (2020). Constructing Separable Non-$2\pi$-Periodic Solutions to the Navier-Lamé Equation in Cylindrical Coordinates Using the Buchwald Representation: Theory and Applications.
Advances in Applied Mathematics and Mechanics. 12 (3).
694-728.
doi:10.4208/aamm.OA-2019-0128