JETP, Vol. 64,
No. 5,
p. 1046 (November 1986)
(Russian original - ZhETF,
Vol. 91,
No. 5,
p. 1767,
November 1986
)
Two-dimensional models of disordered systems with a relativistic spectrum: exact results and the 1/N expansion
A.M. Tsvelik
Received: April 8, 1986
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