Haese-Hill, William Hallnas, Martin Veselov, Alexander On the spectra of real and complex Lame operators On the spectra of real and complex Lame operators Lame operators;Finite-gap operators;Spectral theory;Non-self-adjoint operators;Mathematical Sciences not elsewhere classified 2017-07-20
    https://repository.lboro.ac.uk/articles/journal_contribution/On_the_spectra_of_real_and_complex_Lame_operators/9387812