Velichko, I. G., Stegantseva, P. G., Величко, И. Г., Стеганцева, П. Г., Величко, И. Г., & Стеганцева, П. Г. (2010). Example of a function of two variables that cannot be an $R$-function. Institute of Mathematics, NAS of Ukraine.
Chicago Style (17th ed.) CitationVelichko, I. G., P. G. Stegantseva, И. Г Величко, П. Г Стеганцева, И. Г Величко, and П. Г Стеганцева. Example of a Function of Two Variables That Cannot Be an $R$-function. Institute of Mathematics, NAS of Ukraine, 2010.
MLA (8th ed.) CitationVelichko, I. G., et al. Example of a Function of Two Variables That Cannot Be an $R$-function. Institute of Mathematics, NAS of Ukraine, 2010.
Warning: These citations may not always be 100% accurate.