%0 Journal Article %A Hasannia Kolaee, Mansoureh %A Mirzapour Al-e-Hashem, Seyed Mohammad Javad %T Stochastic medical tourism problem with variable residence time considering gravity function %J RAIRO. Operations Research %D 2022 %P 1685-1716 %V 56 %N 3 %I EDP-Sciences %U https://www.numdam.org/articles/10.1051/ro/2022082/ %R 10.1051/ro/2022082 %G en %F RO_2022__56_3_1685_0