@article{MZ_1984__186_173441,
     author = {Eugenio Sinestrari},
     title = {On a {Class} of {Retarded} {Partial} {Differential} {Equations.}},
     journal = {Mathematische Zeitschrift},
     pages = {223--246},
     year = {1984},
     volume = {186},
     zbl = {0521.35044},
     url = {http://geodesic.mathdoc.fr/item/MZ_1984__186_173441/}
}