@article{MABA_1996_10_4_a6,
     author = {T. S. Todorov},
     title = {On a {Class} of {Nelson-Type} {Examples} for {Higher} {Order} {Partial} {Differential} {Operators}},
     journal = {Mathematica balkanica},
     pages = {373},
     publisher = {mathdoc},
     volume = {10},
     number = {4},
     year = {1996},
     url = {http://geodesic.mathdoc.fr/item/MABA_1996_10_4_a6/}
}