@misc{time+optimal+feedback+control+of+a+discontinuous+dynamic+object,
    author = {Hejmo, Władysław},
    title = {Time-optimal feedback control of a discontinuous dynamic object},
    address = {Kraków},
    publisher = {Politechnika Krakowska},
    date = {1993},
    ISSN = {0860-097X}
}