TY - JOUR AU - McLaughlin, Joyce AU - Portnoy, Arturo TI - Perturbation expansions for eigenvalues and eigenvectors for a rectangular membrane subject to a restorative force JO - Electronic research announcements of the American Mathematical Society PY - 1997 SP - 72 EP - 77 VL - 03 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1090/S1079-6762-97-00027-9/ DO - 10.1090/S1079-6762-97-00027-9 ID - 10_1090_S1079_6762_97_00027_9 ER -