@Article{ T.VK.AKes20, author = { ANOOP, T. V. and ASHOK KUMAR, K and Kesavan, S }, title = { A shape variation result via the geometry of eigenfunctions }, journal = { Journal of Differential Equations }, year = { 2021 }, doi = { https://doi.org/10.1016/j.jde.2021.07.001 }, volume = { 298 }, pages = { 430-462 }, URL = { http://cvgmt.sns.it/paper/4862/ }, note = { cvgmt preprint} }