%0 Journal Article %A Parajdi, Lorand Gabriel %A Precup, Radu %A Haplea, Ioan Ştefan %T A method of lower and upper solutions for control problems and application to a model of bone marrow transplantation %J International Journal of Applied Mathematics and Computer Science %D 2023 %P 409-418 %V 33 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IJAMCS_2023_33_3_a4/ %G en %F IJAMCS_2023_33_3_a4