First case of strong gravitational lensing by a QSO

Based on the article "First case of strong gravitational lensing by a QSO: SDSS J0013+1523 at z = 0.120", by et al.
Published in Astronomy & Astrophysics, 2010, vol. 516, L12
Based on the article "First case of strong gravitational lensing by a QSO: SDSS J0013+1523 at z = 0.120", by et al.
Published in Astronomy & Astrophysics, 2010, vol. 516, L12