Meftah M. et al. Solar radius determined from PICARD/SODISM observations and extremely weak wavelength dependence in the visible and the near-infrared (англ.) // Astronomy & Astrophysics. — 2018. — Vol. 616. — P. A64. — doi:10.1051/0004-6361/201732159. — Bibcode: 2018A&A...616A..64M.
Meftah M. et al. Solar radius determined from PICARD/SODISM observations and extremely weak wavelength dependence in the visible and the near-infrared (англ.) // Astronomy & Astrophysics. — 2018. — Vol. 616. — P. A64. — doi:10.1051/0004-6361/201732159. — Bibcode: 2018A&A...616A..64M.