%0 Journal Article
%A Ditkowski, Adi
%T Mathematical analysis of the optimizing acquisition and retention over time problem
%J ESAIM: Modélisation mathématique et analyse numérique
%D 2009
%P 119-137
%V 43
%N 1
%I EDP-Sciences
%U http://www.numdam.org/articles/10.1051/m2an:2008043/
%R 10.1051/m2an:2008043
%G en
%F M2AN_2009__43_1_119_0