Geodesic
Essen tially nonlinear scalar fields and the geometry of space-time
Teoretičeskaâ i matematičeskaâ fizika, Tome 11 (1972) no. 3, pp. 293-300

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A study i s made of the curvature of space-time in essentially nonlinear fields. The determination of the metric in a field with given Lagrangian is discussed . It i s shown that if the Lagrangian is previously known, measurement of the velocity of signals in given fields enables one to verify predictions of the theory . A further interesting consequence of curvature of space-time is considered – the universal interaction of all fields with a given essentially nonlinear field. 
@article{TMF_1972_11_3_a2,
     author = {Nguyen Van Hieu},
     title = {Essen tially nonlinear scalar fields and the geometry of space-time},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {293--300},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1972_11_3_a2/}
}
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Nguyen Van Hieu. Essen tially nonlinear scalar fields and the geometry of space-time. Teoretičeskaâ i matematičeskaâ fizika, Tome 11 (1972) no. 3, pp. 293-300. http://geodesic.mathdoc.fr/item/TMF_1972_11_3_a2/