{. Whitehead. Work, its rewards and discontents Arno Press, New York, Reprint of the ed. publ. by Harvard Univ. Press, Cambridge, Mass., 1938, Vol. 1 and 2 edition, (1977)
S. Alsubai, and S. North. WEBIST (Revised Selected Papers), volume 322 of Lecture Notes in Business Information Processing, page 1-20. Springer, (2017)