Geodesic
Quasipotential equations for spin particles with different masses
Teoretičeskaâ i matematičeskaâ fizika, Tome 5 (1970) no. 2, pp. 244-252 
P. N. Bogolyubov. Quasipotential equations for spin particles with different masses. Teoretičeskaâ i matematičeskaâ fizika, Tome 5 (1970) no. 2, pp. 244-252. http://geodesic.mathdoc.fr/item/TMF_1970_5_2_a6/
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     author = {P. N. Bogolyubov},
     title = {Quasipotential equations for spin particles with different masses},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {244--252},
     year = {1970},
     volume = {5},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1970_5_2_a6/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

A study is made of the possible form of quasipotential equations for particles with spin 1/2 and different masses. It is shown that Markov–Yukawa type conditions can be used to obtain a Logunov–Tavkhelidze type quasipotential equation for spin particles with different masses.

[1] V. R. Garsevanishvili, V. A. Matveev, L. A. Slepchenko, A. N. Tavkhelidze, Phys. Rev. Lett., 29B (1968), 191

[2] P. N. Bogolubov, Preprint JINR E2-4417, 1969 | MR | Zbl

[3] L. L. Jenkovsky, V. P. Shelest, B. V. Struminsky, G. M. Zinovjev, Preprint ITP-70-12, Kiev, 1970

[4] A. A. Logunov, A. N. Tavkhelidze, Nuovo Cim., 29 (1963), 380 | DOI | MR

[5] O. A. Khrustalev, Preprint IFVE STF-69-24, Serpukhov, 1969 | MR

[6] V. P. Shelest, Preprint ITF 67-54, Kiev, 1967