- S. M. Aseev, A. V. Kryazhimskii, “The Pontryagin maximum principle and optimal economic growth problems”, Proc. Steklov Inst. Math., 257, no. 1, 2007,
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- Viktor Oliinyk, Olga Kozmenko, “Optimization of investment portfolio management”, Serb J Management, 14, no. 2, 2019,
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