Exact set of equations for the Green's functions in the Heisenberg model

1975 ◽  
Vol 12 (15) ◽  
pp. 575-580
Author(s):  
E. S. Fradkin ◽  
O. K. Kalashnikov
Author(s):  
Guilherme Ramalho Costa ◽  
José Aguiar santos junior ◽  
José Ricardo Ferreira Oliveira ◽  
Jefferson Gomes do Nascimento ◽  
Gilmar Guimaraes

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