Sums of the divisor and unitary divisor functions. D. Suryanarayana; M.V. Subbarao — 1978 Journal für die reine und angewandte Mathematik
Product partitions and recursion formulae. Subbarao, M.V. — 2004 International Journal of Mathematics and Mathematical Sciences
On the local distribution of the iterated divisor function. Kátai, I.; Subbarao, M.V. — 2004 Mathematica Pannonica
A remark on a paper written by J. M. De Koninck and A. Ivić. Kátai, Imre; Subbarao, M.V. — 2006 Mathematica Pannonica
On the iterates of the sum of exponential divisors. Kátai, I.; Subbarao, M.V. — 1999 Mathematica Pannonica
On the function ζ ( S ) ζ ( S - A ) ⋯ ζ ( S - R A ) = ∑ σ A , R + 1 ( N ) N S . Kátai, Imre; Subbarao, M.V. — 2005 Mathematica Pannonica