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1016/0030-4018(96)00368-9. http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TVF-497C4YV-BW&_user=10&_coverDate=12%2F15%2F1996&_alid=550869877&_rdoc=3&_fmt=summary&_orig=search&_cdi=5533&_sort=d&_docanchor=&view=c&_ct=3&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=688bbca25fdd98e29caadb676b003c1e.
1 2 Kouznetsov, D.; Moloney, J.V. (2004). “Boundary behavior of modes of Dirichlet laplacian”. Journal of Modern Optics 51 (13): 1955–1962. Bibcode: 2004JMOp...51.1955K. doi:10.1080/09500340408232504.