@article{PS_2006__10__206_0,
     author = {Johnson, Oliver and Goldschmidt, Christina},
     title = {Preservation of log-concavity on summation},
     journal = {ESAIM: Probability and Statistics},
     pages = {206--215},
     publisher = {EDP-Sciences},
     volume = {10},
     year = {2006},
     doi = {10.1051/ps:2006008},
     mrnumber = {2219340},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ps:2006008/}
}