@Article{fmdv-2015,
  title = 	 {Fast integer-valued algorithms for optimal allocations under constraints in stratified sampling},
  author = 	 {Ulf Friedrich and Ralf M{\"u}nnich and Sven de Vries and Matthias Wagner},
  journal = 	 {Computational Statistics and Data Analysis},
 url = {http://dx.doi.org/10.1016/j.csda.2015.06.003},
   volume = {92},
  pages={1-12},
  year = 	 {2015},