1. G. Khudajberganov, Ob odnorodno-polinomial`no vy`pukloj obolochke ob`edineniya sharov, Dep. v VINITI, 21, 1772 – 1185 (1982).
2. Yu. B. Zelinskij, I. Yu. Vy`govskaya, Kh. K. Dakkhil, Zadacha o teni i smezhny`e zadachi, Proc. Int. Geom. Cent., 9, № 3-4, 50 – 58 (2016).
3. I. Yu. Vy`govskaya, Yu. B. Zelinskij, M. V. Stefanchuk, Obobshhenno vy`pukly`e mnozhestva i zadacha o teni, Ukr. mat. zhurn., 67, № 12, 1658 – 1666 (2015).
4. Yu. B. Zelinskij, M. V. Stefanchuk, Uzagal`nennya zadachi pro tin, Ukr. mat. zhurn., 68, № 6, 757 – 762 (2016).
5. Y. B. Zelinskii, Generalized convex envelopes of sets and the problem of shadow , J. Math. Sci., 211, № 5, 710 – 717 (2015), https://doi.org/10.1007/s10958-015-2626-8