Perturbation expansions for eigenvalues and eigenvectors for a rectangular membrane subject to a restorative force. McLaughlin, Joyce R.; Portnoy, Arturo — 1997 Electronic Research Announcements of the American Mathematical Society [electronic only]
Eigenvalue formulas for the uniform Timoshenko beam: the free-free problem. Geist, Bruce; McLaughlin, Joyce R. — 1998 Electronic Research Announcements of the American Mathematical Society [electronic only]