Anomalous fluctuations in observations of Q0957+561 A,B: Smoking gun of a cosmic string?R. Schild, I. S. Masnyak, B. I. Hnatyk and V. I. ZhdanovA&A, 422 2 (2004) 477-482DOI: https://doi.org/10.1051/0004-6361:20040274
