Matematicheskie i tekhnicheskie problemy obrabotki vizual'noĭ informa︠t︡sii : sbornik nauchnykh trudov - Alekseev, A. S.; P︠i︡atkin, V. P. (Rossiĭska︠i︡a akademi︠i︡a nauk, Sibirskoe otdelenie, Vychislitelʹnyĭ ︠t︡sentr, 1992)