http://conf.nsc.ru/files/conferences/Lyap-100/abstracts/75538/75539/%D0%9B%D1%8F%D0%BF%D1%83%D0%BD%D0%BE%D0%B22011_%D1%80%D0%B0%D1%81%D1%88_%D1%82%D0%B5%D0%B7_%D0%93%D1%80%D0%B8%D0%BD%D1%87%D0%B5%D0%BD%D0%BA%D0%BE.pdf