The four references cover four important directions in Machine Learning;
namely, Neural Networks, Robust Detection, Knowledge Profiling,
and Intelligent Systems [1,2,3,4].

[1]
Antognetti, P., Miluinovic, V., (1991).
*Neural networks: concepts, applications and implementations*.
Prentice Hall Professional Technical Reference.

[2]
Milutinovic, V. M. (1980).
Comparison of three suboptimum detection procedures.
*Electronics Letters*, *16*(17), 681-683.

[3]
Jelisavčić, V., Furlan, B., Protić, J., & Milutinović, V. (2012, May).
Topic models and advanced algorithms for profiling of knowledge in scientific papers.
In *2012 Proceedings of the 35th International Convention MIPRO* (pp. 1030-1035). IEEE.

[4]
Furlan, B., Nikolic, B., & Milutinovic, V. (2013).
A Survey and Evaluation of State‐of‐the‐Art Intelligent Question Routing Systems.
*International journal of intelligent systems*, *28*(7), 686-708.