Сухорольський, М.А., Івасик, Г.В. and Достойна, В.В. 2014. Solutions of helmholtz equation in complex domain. Eastern-European Journal of Enterprise Technologies. 5, 4(71) (Oct. 2014), 10–15. DOI:https://doi.org/10.15587/1729-4061.2014.27680.