El'sgol'c, L. Ė. (1964). Qualitative methods in mathematical analysis. American Mathematical Society.
Chicago Style (17th ed.) CitationEl'sgol'c, Lev Ėrnestovich. Qualitative Methods in Mathematical Analysis. Providence: American Mathematical Society, 1964.
MLA (9th ed.) CitationEl'sgol'c, Lev Ėrnestovich. Qualitative Methods in Mathematical Analysis. American Mathematical Society, 1964.