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A preliminaty draft of this paper appeared as Istituto Matematico « L. Tonelli » preprint 78-6 (February 1978) (unpublished).
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Goldoni, R. Dynamical space and gravitation within a purely geometrical framework. Lett. Nuovo Cimento 23, 103–111 (1978). https://doi.org/10.1007/BF02762505
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DOI: https://doi.org/10.1007/BF02762505