Tito Sierra

Nicholson, S., Sierra, T., Eseryel, U. Y., Park, J. H., Barkow, P., Pozo, E. J., & Ward, J. (2006). How much of it is real? Analysis of paid placement in Web search engine results. JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE AND TECHNOLOGY, 57(4), 448–461. https://doi.org/10.1002/asi.20318