1. Bakman, Y.: Robust understanding of word problems with extraneous information (2007).
arXiv: math/0701393
2. Bobrow, D.G.: Natural language input for a computer problem solving system (1964)
3. Briars, D.J., Larkin, J.H.: An integrated model of skill in solving elementary word problems. Cognit. Instr. 1(3), 245–296 (1984)
4. Cetintas, S., Si, L., Xin, Y.P., Zhang, D., Park, J.Y.: Automatic text categorization of mathematical word problems. In: FLAIRS Conference (2009)
5. Cetintas, S., Si, L., Xin, Y.P., Zhang, D., Park, J.Y., Tzur, R.: A joint probabilistic classification model of relevant and irrelevant sentences in mathematical word problems. JEDM J. Educ. Data Min. 2(1), 83–101 (2010)