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

Kovalevskiĭ, I. V., ︠I︡U. I. Morozov, and V. N. Lugovenko. Metody Raspoznavani︠i︡a Obrazov V Analize Slozhnykh Fizicheskikh ︠i︡avleniĭ. Moskva: Akademi︠i︡a nauk SSSR, In-t zemnogo magnetizma, ionosfery i rasprostraneni︠i︡a radiovoln, 1989.

Kovalevskiĭ, I. V., et al. Metody Raspoznavani︠i︡a Obrazov V Analize Slozhnykh Fizicheskikh ︠i︡avleniĭ. Akademi︠i︡a nauk SSSR, In-t zemnogo magnetizma, ionosfery i rasprostraneni︠i︡a radiovoln, 1989.