Spatio-temporal characterization of self-formed hollow light pulses in the pump depletion regime of second harmonic generationD. Majus, O. Jedrkiewicz, M. Molteni, P. Ragazzi, P. Di Trapani and G. TamošauskasEur. Phys. J. Special Topics, 199 (2011) 77-87DOI: https://doi.org/10.1140/epjst/e2011-01504-2