Li, H., Liu, T., Ma, W., Sakai, T., Wong, K., & Zhou, G. (2020). Information Retrieval Technology. Springer Berlin Heidelberg.

Li, Hang, Ting Liu, Wei-Ying Ma, Tetsuya Sakai, Kam-Fai Wong, και Guodong Zhou. Information Retrieval Technology. Springer Berlin Heidelberg, 2020.

Li, Hang, et al. Information Retrieval Technology. Springer Berlin Heidelberg, 2020.