1. Bishop, C. M. (2006). Pattern recognition and machine learning. New York: Springer.
2. Callaert, J., Grouwels, J., & Van Looy, B. (2011), Delineating the scientific footprint in technology: Identifying scientific publications within non-patent references. In: E. Noyons, P. Ngulube & J. Leta (Eds.), Proceedings of ISSI 2011—The 13th International Conference on Scientometrics and Informetrics, Durban (pp. 13–18). San Juan: ISSI.
3. Callaert, J., Van Looy, B., Verbeek, A., Debackere, K., & Thijs, B. (2006). Traces of prior art: An analysis of non-patent references found in patent documents. Scientometrics, 69(1), 3–20.
4. Guan, J. C., & He, Y. (2007). Patent-bibliometric analysis on the Chinese science—Technology linkages. Scientometrics, 72(3), 403–425.
5. Harhoff, D., Scherer, F. M., & Vopel, K. (2003). Citations, family size, opposition and the value of patent rights. Research Policy, 32(8), 1343–1363.