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Mathematica Applicanda > 2018 > 46 > 1
Formalized Mathematics > 2015 > 23 > 4 > 325-331
International Journal of Applied Mathematics and Computer Science > 2013 > 23 > 1 > 213-229
International Journal of Applied Mathematics and Computer Science > 2013 > 23 > 1 > 213-229
International Journal of Applied Mathematics and Computer Science > 2003 > 13 > 3 > 395-406