Umaporn NuntaplookJohn AdamMahidol UniversityOld Dominion University2018-11-092018-11-092014-01-01Applied Mathematics E - Notes. Vol.14, (2014), 185-192160725102-s2.0-84921829656https://repository.li.mahidol.ac.th/handle/20.500.14594/34136© 2014 Tsing Hua University. All rights reserved. It is shown that the iteration technique gives a better approximation for the problem with long wavelengths.Mahidol UniversityMathematicsArticleSCOPUS