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Andreev, Nikolay, Peter Vassilev, Vassia Atanassova, Olympia Roeva, and Krassimir Atanassov. Generalized net model of the cooperation between the Departments of transfusion Haematology and the National Centre of transfusion Haematology In Ad¬vances in Neural Networks and Applications 2018 (ANNA?18). St. Konstantin and Elena Resort, Bulgaria, 2018.