1. 1. V. M. Bondarenko, A. G. Zavadskiĭ, L. A. Nazarova, "On representations of tame partially ordered sets", Predstavl. Kvadrat. Formy, 75-106 (1979)
2. English translation: Amer. Math. Soc. Transl. Ser. 2, 128, 55-78 (1986).
3. 2. V. M. Bondarenko, M. V. Stepochkina, "(Min, max)-equivalence of posets and quadratic Tits form," in: Problems of Analysis and Algebra [in Russian], 2, No. 3, Inst. Mat. NAN Ukr., Kyiv (2005), pp. 18-58.
4. 3. V. M. Bondarenko, M. V. Stepochkina, "On serial posets with positive-definite quadratic Tits form," Nelin. Kolyv., 9, No. 3, 320-325 (2006)
5. English translation: Nonlinear Oscil., 9, No. 3, 312-316 (2006), https://doi.org/10.1007/s11072-006-0045-y