fnrooti(). See  and  for more details, the implementation in  is also presented in .
 E. Cuthill and J. McKee. Reducing the bandwidth of sparse symmetric matrices. In Proceedings of the 1969 24th national conference, pages 157-172, New York, NY, USA, 1969. ACM Press.
 Alan George and Joseph W. H. Liu. Computer solution of large sparse positive definite systems. Prentice-Hall series in computational mathematics. Prentice-Hall, Englewood Cliffs, NJ, USA, 1981.
 N. E. Gibbs, W. G. Poole, and P. K. Stockemeyer. An algorithm for reducing the bandwidth and profile of a sparse matrix. SIAM Journal of Numerical Analysis, 13(2):236-250, April 1976.
 Alan George and Joseph W. H. Liu. An implementation of a pseudoperipheral node finder. ACM Trans. Math. Softw., 5(3):284-295, 1979.
 Wai-Hung Liu and Andrew H. Sherman. Comparative analysis of the Cuthill-McKee and the reverse Cuthill-McKee ordering algorithms for sparse matrices. SIAM Journal on Numerical Analysis, 13(2):198-213, April 1976.