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Vol 29, No 3 (2015): The 18th Geometrical Seminar - Proceedings of 18th GS
Four-dimensional, Ricci- at manifolds which admit a metric
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Vol 33, No 4 (2019): The 20th Geometrical Seminar 2018 - 20Geometric-Velimirovic
Symmetries in 4-dimensional Manifolds
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ISSN: 2406-0933