@article{COMIM_1994_2_1_a5,
     author = {Mawhin, Jean},
     title = {Some remarks on semilinear problems at resonance where the nonlinearity depends only on the derivatives},
     journal = {Communications in Mathematics},
     pages = {61--69},
     year = {1994},
     volume = {2},
     number = {1},
     mrnumber = {1309064},
     zbl = {0853.34021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/COMIM_1994_2_1_a5/}
}