@article{GDZPPN002096250,
title = {On the Number of Solutions of the Equation ...= ...aj(t)xj, 0...t...1, for which x(0) = x(1).},
journal = {Inventiones mathematicae},
volume = {56},
year = {1980},
pages = {67-76},
zbl = {0448.34012},
url = {http://dml.mathdoc.fr/item/GDZPPN002096250}
}
Neto, Alcides Lins. On the Number of Solutions of the Equation ...= ...aj(t)xj, 0...t...1, for which x(0) = x(1).. Inventiones mathematicae, Tome 56 (1980) pp. 67-76. http://gdmltest.u-ga.fr/item/GDZPPN002096250/