@article{IM_1980__59_142730,
     author = {Alcides Lins Neto},
     title = {On the {Number} of {Solutions} of the {Equation} ...= ...aj(t)xj, 0...t...1, for which x(0) = x(1).},
     journal = {Inventiones mathematicae},
     pages = {67--76},
     publisher = {mathdoc},
     volume = {59},
     year = {1980},
     zbl = {0448.34012},
     url = {http://geodesic.mathdoc.fr/item/IM_1980__59_142730/}
}