Duggal, B. P. (1974) “Functional Equations and Linear Transformations I (Solvability on L<sub>p</sub> Spaces)”, The Journal of the Indian Mathematical Society, 38(1-4), pp. 71–97. Available at: https://www.informaticsjournals.com/index.php/jims/article/view/16683 (Accessed: 3 May 2024).