Quantum fluctuations and density of states in low-dimensional superconductors Alexey A. Radkevich, Andrew G. Semenov and Andrei D. Zaikin Eur. Phys. J. Special Topics, 227 15-16 (2019) 2289-2295 Published online: 18 January 2019 DOI: 10.1140/epjst/e2018-800046-x