Akos Botos, Andrei N. Khlobystov, Bea Botka, Rudi Hackl, Edit Szekely, Bela Simandi, Katalin Kamaras: Investigation of fullerene encapsulation in carbon nanotubes using a complex approach based on vibrational spectroscopy. 2010Physica Status Solidi B-Basic Solid State Physics: 247. ISBN 0370-1972 http://dx.doi.org/10.1002/pssb.201000375