The nebular spectra of the transitional Type Ia Supernovae 2007on and 2011iv: Broad, multiple components indicate aspherical explosion cores
P. Mazzali, P. Mazzali, C. Ashall, C. Ashall, E. Pian, M. Stritzinger, C. Gall, C. Gall, M. Phillips, P. Hoeflich, E. Hsiao