@article{TIMM_2012_18_2_a2,
     author = {D. I. Borisov},
     title = {On a~$\mathcal{PT}$-symmetric waveguide with a~pair of small holes},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {22--37},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2012_18_2_a2/}
}