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NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS, vol. 11, no. 1, page. 313 - 322, 2010-02

JOURNAL OF PURE AND APPLIED ALGEBRA, vol. 219, no. 9, page. 4055 - 4060, 2015-09

JOURNAL OF CLASSIFICATION, vol. 27, no. 2, page. 158 - 172, 2010-09

Journal of the Korean Society for Industrial and Applied Mathematics, vol. 19, no. 1, 2015-03

GRAPHS AND COMBINATORICS, vol. 26, no. 2, page. 147 - 162, 2010-03

ELECTRONIC JOURNAL OF COMBINATORICS, vol. 17, no. 1, 2010-08-16

JOURNAL OF DIFFERENTIAL EQUATIONS, vol. 249, no. 7, page. 1519 - 1530, 2010-10-01

MATHEMATISCHE ZEITSCHRIFT, vol. 280, no. 3-4, page. 643 - 667, 2015-08

APPLIED MATHEMATICS AND COMPUTATION, vol. 267, page. 365 - 381, 2015-09-15

APPLIED MATHEMATICS AND COMPUTATION, vol. 271, page. 618 - 641, 2015-11-15