|  ZhETF, Vol. 154, 
No. 5,
p. 1051 (November 2018)
 (English translation - JETP, 
	Vol. 127, No. 5,
	p. 948,
	November 2018
	available online at www.springer.com
)
 
 
 
	Tetrads in solids: from elasticity theory to topological quantum Hall systems and Weyl fermionsNissinen J., Volovik G.E.
 
 Received: April 9, 2018
 
 DOI: 10.1134/S0044451018110172
 
 
 Extended Abstract. The full text of this paper is published in the English version of JETP.
 
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