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Russian Mathematics > 2015 > 59 > 9 > 62-66
Journal of Symbolic Computation > 2013 > 55 > Complete > 59-71
Journal of Contemporary Mathematical Analysis (Armenian Academy of Sciences) > 2013 > 48 > 5 > 209-220
Differential Geometry and its Applications > 2011 > 29 > Supplement 1 > S16-S27
IEE Proceedings A - Physical Science, Measurement and Instrumentation,... > 1985 > 132 > 1 > 28 - 32