@article{etna_vol9_pp26-38,
  author  = {G. S. Ammar and D. Calvetti and L. Reichel},
  title   = {Computation of Gauss-Kronrod quadrature rules with non-positive weights},
  journal = {Electron. Trans. Numer. Anal.},
  volume  = {9},
  year    = {1999},
  pages   = {26--38},
}