“Urwick, Edward. J. The Message of Plato: A re-interpretation of the 'Republic'. London: Metheun and Co. Ltd., 1920. quoted in : Bhaskar Kamble, The Imperishable Seed: How Hindu Mathematics Changed the World and why this History was Erased, Garuda Prakashan Private Limited, 2022 ISBN 9798885750189”

Source: Wikiquote