https://ru.m.wikipedia.org/wiki/%D0%93%D0%BB%D1%83%D1%85%D0%BE%D0%B9_%D0%B3%D1%83%D0%B1%D0%BD%D0%BE-%D0%B3%D1%83%D0%B1%D0%BD%D0%BE%D0%B9_%D1%81%D0%BF%D0%B8%D1%80%D0%B0%D0%BD%D1%82 Глухой губно-губной спирант — https://en.m.wikipedia.org/wiki/Voiceless_bilabial_fricative Voiceless bilabial fricative - https://en.m.wiktionary.org/wiki/%C9%B8 ɸ - https://books.google.ru/books?id=L-8vCgAAQBAJ&pg=PT307&lpg=PT307&dq=%C9%B8&source=bl&ots=bsyVGEQ1zl&sig=Wg41AxLIsvzNeN_VQlNGiAH_fj0&hl=ru The Collected Papers of Bertrand Russell, Volume 5: Toward ...https://books.google.ru/books?id=ZE_tBAAAQBAJ&pg=PA173&lpg=PA173&dq=%C9%B8&source=bl&ots=gAMCzJHYix&sig=99I2rqP4hanvLek36Bu-iXoWgD8&hl=ru ICAS2014-Intern