Amaral, C. M. d. (1971). The quaternionic equations of gravitation obtained from the quaternionic bianchi identities. Rio de Janeiro: Centro Brasileiro de Pesquisas Fisicas.
Παραπομπή Chicago StyleAmaral, C. Marcio do. The Quaternionic Equations of Gravitation Obtained From the Quaternionic Bianchi Identities. Rio de Janeiro: Centro Brasileiro de Pesquisas Fisicas, 1971.
Παραπομπή MLAAmaral, C. Marcio do. The Quaternionic Equations of Gravitation Obtained From the Quaternionic Bianchi Identities. Rio de Janeiro: Centro Brasileiro de Pesquisas Fisicas, 1971.
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