1. Abramowitz, M., Stegun, I.A. (eds): Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables. National Bureau of Standards Appl. Math. Ser. 55. Dover Publications, New York (1964)
2. Arscott F.M.: Periodic differential equations. Pergamon Press, New York (1964)
3. Belokolos D., Enolskii V. Z.: Reduction of Abelian functions and algebraically integrable systems. II. Complex analysis and representation theory. J. Math. Sci. (New York) 108, 295–374 (2002)
4. Borcea J.: Choquet order for spectra of higher Lamé operators and orthogonal polynomials. J. Approx. Theory 151, 164–180 (2008)
5. Borcea, J., Brändén, P., Shapiro B.: Higher Lamé equations, Heine-Stieltjes and Van Vleck polynomials. In preparation