@article{FangGuerreroMarquezLugoetal.2014,
  author    = {X. Fang and Mart{\´i}n A. Guerrero and R. A. Marquez-Lugo and Jes{\´u}s Alberto Toala and S. J. Arthur and Y.-H. Chu and William P. Blair and R. A. Gruendl and Wolf-Rainer Hamann and Lida Oskinova and Helge Tobias Todt},
  title     = {Expansion of hydrogen-poor knots in the born-again planetary nebulae A30 and A78},
  journal   = {The astrophysical journal : an international review of spectroscopy and astronomical physics},
  volume    = {797},
  number    = {2},
  doi       = {10.1088/0004-637X/797/2/100},
  year      = {2014},
}