[1] P. K. Kamthan: Convex functions and their applications. Rev. Facul. Scs. Uni. d'Istan., Ser. A, 28 (1963), 71-78. MR 0207927 | Zbl 0158.30501

[2] P. K. Kamthan: On the mean values of an entire function. The Math. Student, Nos. 1 & 2, 32,(1964), 101-109. MR 0186815 | Zbl 0171.04301

[3] P. K. Kamthan: Mean values of entire functions (II). Rev. Mate. His-Americana, Ser. 4, No. 6,24, (1964), 218-222. MR 0174745 | Zbl 0135.28801

[4] P. K. Kamthan: On the mean values of an entire function represented by Dirichlet series. Acta Math. Acad. Sci. Hung, 15, (1964), 133-136. MR 0165082 | Zbl 0171.04301

[5] P. K. Kamthan: The above article (II). the above Journal, 16, (1965), 89-92. MR 0177113

[6] P. K. Kamthan: On entire functions represented by Dirichlet series (IV). Ann. Inst. Fourier, Grenoble, 16, (1966), 209-223. MR 0226016 | Zbl 0145.08103