Unique Determination of Cyclotomic Numbers of Order Five. S.A. Katre; A.R. Rajwade — 1985 Manuscripta mathematica
On the Jacobsthal sum ...(a) and the related sum ...(a). S.A. Katre; A.R. Rajwade — 1983 Mathematica Scandinavica
Resolution of the sign ambiguity in the determination of the cyclotomic numbers of order 4 and the corresponding Jacobsthal sum. S.A. Katre; A.R. Rajwade — 1987 Mathematica Scandinavica