Okhrimenko, C. A., & Targonskij, A. L. (2013). Extremal problems on ray systems.
Chicago Style (17th ed.) CitationOkhrimenko, C. A., and A. L. Targonskij. Extremal Problems on Ray Systems. 2013.
MLA (8th ed.) CitationOkhrimenko, C. A., and A. L. Targonskij. Extremal Problems on Ray Systems. 2013.
Warning: These citations may not always be 100% accurate.