JOURNAL OF PEDIATRIC SURGERY, cilt.28, sa.1, ss.78-81, 1993 (SCI-Expanded)
We point out that a peculiar annihilation of a vortex-antovortex pair observed numerically by Hertel and Schneider [Phys. Rev. Lett. 97, 177202 (2006)] represents the formation and subsequent decay of a skyrmion.