@article{ZNSL_1975_51_a11,
     author = {M. M. Popov},
     title = {An addition to the work {``Diffraction} loses of confocal resonator with mirrors of arbitrary shape''},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {170--171},
     publisher = {mathdoc},
     volume = {51},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1975_51_a11/}
}