Metody raspoznavani︠i︡a obrazov v analize slozhnykh fizicheskikh ︠i︡avleniĭ - Kovalevskiĭ, I. V. (Akademi︠i︡a nauk SSSR, In-t zemnogo magnetizma, ionosfery i rasprostraneni︠i︡a radiovoln, 1989)