photosphère
1960 / The Surfaces of Stars / B. E. J. Pagel / Quarterly Journal of the Royal Astronomical Society 1 (1960) p. 56 [lien]
2012 / The Sun's Global Photospheric and Coronal Magnetic Fields: Observations and Models / Duncan Mackay ; Anthony Yeates / Living Reviews in Solar Physics 9 (2012) p. 1 [doi]