On Reisz and Euler means of the series of orthogonal polynomials C. M. Patel — 1969 Matematički Vesnik
On the degree of approximation of partial sums of Fourier-Bessel series V. K. Puri; C. M. Patel — 1980 Matematički Vesnik
On the Riesz summability of orthogonal series P. S. Kantawala; S. R. Agrawal; C. M. Patel — 1991 Matematički Vesnik