Protonebulosa planetaria (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Protonebulosa planetaria" in Spanish language version.

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harvard.edu

Volk, Kevin M.; Kwok, Sun (1989). «Evolution of protoplanetary nebulae». Astrophysical Journal, Part 1 (ISSN 0004-637X) 342. pp. 345-363.
Kastner, J.H. (2005). «Near-death Transformation: Mass Ejection in Planetary Nebulae and Protoplanetary Nebulae». American Astronomical Society Meeting 206, #28.04; Bulletin of the American Astronomical Society 37. p. 469.
Davis, C. J.; Smith, M. D.; Gledhill, T. M.; Varricatt, W. P. (2005). «Near-infrared echelle spectroscopy of protoplanetary nebulae: probing the fast wind in H2». Monthly Notices of the Royal Astronomical Society 360 (1). pp. 104-118.