@article{PismaZhETF.101.94,
    title = {Boundary conditions and surface state spectra in topological insulators},
    author = {Enaldiev, V. V. and Zagorodnev, I. V. and Volkov, V. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {101},
    issue = {2},
    pages = {94},
    year = {2015},
    doi = {10.7868/S0370274X15020058},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X15020058},
}