@article{oai:tsukuba.repo.nii.ac.jp:00029816,
 author = {Niikuni, Hiroaki},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {39--65},
 title = {Identification of the absent spectral gaps in a class of generalized Kronig-Penney Hamiltonians},
 volume = {31},
 year = {2007}
}