Lukovs’kyi , I. O., O. M. Timocha, O. A. Boichuk, and V. Vasylyk. “Volodymyr Leonidovych Makarov (on His 80th Birthday)”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 74, no. 2, Feb. 2022, pp. 147 -50, doi:10.37863/umzh.v74i2.7142.