Tsamis, YG;
Barlow, MJ;
Liu, XW;
Storey, PJ;
Danziger, IJ;
(2004)
A deep survey of heavy element lines in planetary nebulae - II. Recombination-line abundances and evidence for cold plasma.
Monthly Notices of the Royal Astronomical Society
, 353
(3)
pp. 953-979.
10.1111/j.1365-2966.2004.08140.x.