Spin-orbit effects in carbon nanotubes – Analytical resultsKonstantin Nikolaevich Pichugin, Mihal Pudlak and Rashid Giyasovich NazmitdinovEur. Phys. J. B, 87 6 (2014) 124DOI: https://doi.org/10.1140/epjb/e2014-50076-6