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2. Some properties of p(n) and c(n) modulo powers of 13;Atkin;Trans. Amer. Math. Soc.,1967
3. Ramanujan-Twelve Lectures on Subjects Suggested by His Life and Work;Hardy,1940
4. An Introduction to the Theory of Numbers;Hardy,1979
5. Congruence properties and density problems for the Fourier coefficients of modular forms;Hjelle;Math. Scand.,1968