@article{MABA_1991_5_1_a7,
     author = {Mariana D. Beleva},
     title = {Controlled {Wiener} {Process} by {External} {Interventions} {Maximizing} the {Average} {Time} until {Reaching} a {Level}},
     journal = {Mathematica balkanica},
     pages = {66},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {1991},
     url = {http://geodesic.mathdoc.fr/item/MABA_1991_5_1_a7/}
}