Values at the positive integral points of the zeta-function of the hill operator with a finite-zone potential
M. Vodzitskii

References
1.	Akhiezer N.I., Elementy teorii ellipticheskikh funktsii, Nauka, M., 1970
2.	McKean H.P., van Moerbeke P., Invent. Math., 30 (1975), 217–274