MARSZAŁKOWSKI, J. ., J. M. . MARSZAŁKOWSKI, and M. . DROZDOWSKI. “EMPIRICAL STUDY OF LOAD TIME FACTOR IN SEARCH ENGINE RANKING”. Journal of Web Engineering, vol. 13, no. 1-2, Mar. 2014, pp. 114-28, https://journals.riverpublishers.com/index.php/JWE/article/view/3953.