Media type: E-Article Title: Exciton spectrum in multi-shell hexagonal semiconductor nanotube Contributor: O.M. Makhanets; V.I. Gutsul; N.R. Tsiupak; O.M. Voitsekhivska imprint: 2012 Published in: Condensed Matter Physics Language: English ISSN: 1607-324X Origination: Footnote: Access State: Open Access