%0 Journal Article %A M. I. Katsnel'son %A V. E. Nazaikinskii %T The~Aharonov--Bohm effect for massless Dirac fermions and the~spectral flow of Dirac-type operators with classical boundary conditions %J Teoretičeskaâ i matematičeskaâ fizika %D 2012 %P 437-453 %V 172 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_2012_172_3_a7/ %G ru %F TMF_2012_172_3_a7