Behnam Hashemi, Yuji Nakatsukasa, “Least-Squares Spectral Methods for ODE Eigenvalue Problems”, SIAM J. Sci. Comput., 44, no. 5, 2022, A3244
Christian Wyss, “Riesz bases for p-subordinate perturbations of normal operators”, Journal of Functional Analysis, 258, no. 1, 2010, 208
Manfred Möller, Bertin Zinsou, “Spectral asymptotics of self-adjoint fourth order boundary value problems with eigenvalue parameter dependent boundary conditions”, Bound Value Probl, 2012, no. 1, 2012, 106
Călin-Ioan Gheorghiu, Spectral Methods for Non-Standard Eigenvalue Problems, 2014, 1