[1]
S. Arabei, J.-P. Galaup, J. McCaffrey, N. Shafizadeh, і C. Crépin, «Electronic spectroscopy, stimulated emission and persistent spectral hole-burning of cryogenic nitrogen matrices doped with tetrabenzoporphin», Fiz. Nizk. Temp., вип. 38, вип. 8, с. 917–923, Чер 2012.