English: The 1987 Academician Nikola Obreshkov Prize, the highest Bulgarian award in the field of mathematics, bestowed by the Presidium of the Bulgarian Academy of Sciences and the Academic Council of Sofia University to Lyubomir Ivanov for his monograph Algebraic Recursion Theory.
Български: Наградата Акад. Никола Обрешков, най-високата българска награда за постижения в областта на математиката, дадена от Президиума на Българската академия на науките и Академичния съвет на Софийския университет на Любомир Иванов за неговата монография Алгебрична теория на рекурсията.
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