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Advances in Applied Clifford Algebras > 2017 > 27 > 2 > 1761-1767
International Journal of Theoretical Physics > 2016 > 55 > 1 > 207-211
Astrophysics and Space Science > 2015 > 358 > 2 > 1-5
General Relativity and Gravitation > 2014 > 46 > 3 > 1-23
General Relativity and Gravitation > 2010 > 42 > 12 > 2957-2980