@article{IJAMCS_2023_33_3_a4,
     author = {Parajdi, Lorand Gabriel and Precup, Radu and Haplea, Ioan \c{S}tefan},
     title = {A method of lower and upper solutions for control problems and application to a model of bone marrow transplantation},
     journal = {International Journal of Applied Mathematics and Computer Science},
     pages = {409--418},
     publisher = {mathdoc},
     volume = {33},
     number = {3},
     year = {2023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IJAMCS_2023_33_3_a4/}
}