@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}, }