@article{MABA_1988_2_3-4_a3,
     author = {T. I. Encheva and A. Iu. Levin},
     title = {Zeros of {Quasi-Polynomials} and {Linear} {Time-Optimal} {Control} {Problem}},
     journal = {Mathematica balkanica},
     pages = {296},
     publisher = {mathdoc},
     volume = {2},
     number = {3-4},
     year = {1988},
     url = {http://geodesic.mathdoc.fr/item/MABA_1988_2_3-4_a3/}
}