327 citations · 1.7k across the 47 of their papers we have counts for
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M. L. Leal-Ferreira, W. H. T. Vlemmings, P. J. Diamond +3
Most of PNe are not spherical. The loss of spherical symmetry occurs somewhere between the AGB and PN phase. The cause of this change of morphology is not yet well known, but magne…