@article{KohLeuNi:18,
  author = {Ulrich Kohlenbach and Lauren\c{t}iu Leu\c{s}tean and Adriana
            Nicolae},
  volume = 20,
  year = 2018,
  title = {Quantitative results on {F}ej\'er monotone sequences },
  pages = {42 pages},
  journal = {Communications in Contemporary Mathematics},
}