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2. Brown, K.M.: Algorithm 316. Solution of simultaneous non-linear equations. Commun. ACM10, 728?729 (1967)
3. Brown, K.M.: A quadratically convergent Newton-like method based upon Gaussian elimination. SIAM J. Numer. Anal.6, 560?569 (1969)
4. Brown, K.M., Dennis, J.E., Jr.: On the second order convergence of Brown's derivative-free method for solving simultaneous nonlinear equations. Res. Rep. N. 71?7, Dept. of Comput. Sci., Yale Univ., New Haven, Connecticut (1971)
5. Chandrasekhar, S.: Radiative transfer. Oxford: At the Clarendon Press (1950)