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PT-Symmetric Waveguides and the Lack of Variational Techniques
- 1.KREJČIŘÍK, D. PT-Symmetric Waveguides and the Lack of Variational Techniques. Integral Equations and Operator Theory. 2012, 73(1), 1-2. ISSN 0378-620X. E-ISSN 1420-8989. Available: doi: 10.1007/s00020-011-1926-8
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