1. K. Chandrasekharan and S. Minakshisundaram,Typical Means, Oxford University Press, (1952).
2. G. D. Dikshit,A note on absolute Riesz summability of infinite series, Proc. National Institute of Sciences of India, Vol. 26A (1960), pp. 541–546.
3. G. D. Dikshit,On inclusion relation between Riesz and Nörlund means, Indian Jour. Math. Vol. 7, No. 2 (1965), pp. 73–81.
4. G. H. Hardy,Divergent Series, Oxford (1949).
5. G. H. Hardy and J. E. Littlewood,Notes on the theory of series (XVII):Some new convergence criteria for Fourier series, Jour. London Math. Soc., Vol. 7 (1932), pp. 252–256.