%0 Journal Article %A Schroeder, Pascal %A Kacem, Imed %A Schmidt, Günter %T Optimal online algorithms for the portfolio selection problem, bi-directional trading and -search with interrelated prices %J RAIRO - Operations Research - Recherche Opérationnelle %D 2019 %P 559-576 %V 53 %N 2 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/ro/2018064/ %R 10.1051/ro/2018064 %G en %F RO_2019__53_2_559_0