1. H. Poincaré, Acta Math. 7, 259 (1885).ACMAA80001-5962
2. C. W. Barnes and P. A. Sturrock, Astrophys. J. 174, 659 (1972).ASJOAB0004-637X
3. B. C. Low, Astrophys. J. 205, 234 (1977).ASJOAB0004-637X
4. B. C. Low, Astrophys. J. 217, 988 (1977).ASJOAB0004-637X
5. J. Birn, H. Goldstein, and K. Schindler, Solar Phys. 57, 81 (1978).SLPHAX0038-0938