1. Funabiki, R. Kusaka, N. Ishihara, and W.-C. Kao, "A proposal of test code generation tool for Java programming learning assistant system," Proc. IEEE Int. Conf. Adv. Inform. Netw. Appl., pp. 51-56, March 2017.
2. Cass, The 2015 top ten programming languages, http://spectrum.ieee.org/computing/soft- ware/the-2015-top-ten-programminglangua- ges/?utm_so.
3. Funabiki, Tana, K. K. Zaw, N. Ishihara, and W.-C. Kao, "A graph-based blank element selection algorithm for fill-in-blank problems in Java programming learning assistant system", IAENG Int. J. Comput. Science, vol. 44, no. 2, pp. 247-260, May 2017.
4. Funabiki, Y. Matsushima, T. Nakanishi, K. Watanabe, and N. Amano, "A Java programming learning assistant system using testdriven development method", IAENG Int. J. Comput. Science, vol.40, no.1, pp. 38-46, Feb. 2013.
5. K. Zaw, N. Funabiki, and W.-C. Kao, "A proposal of value trace problem for algorithm code reading in Java programming learning assistant system", Inf. Eng. Express, vol. 1, no. 3, pp. 9-18, Sep. 2015.