@article{ASNSP_1991_4_18_3_455_0,
     author = {Dancer, E. N.},
     title = {On the existence of two-dimensional invariant tori for scalar parabolic equations with time periodic coefficients},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {455--471},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 18},
     number = {3},
     year = {1991},
     mrnumber = {1145318},
     zbl = {0779.35049},
     language = {en},
     url = {http://archive.numdam.org/item/ASNSP_1991_4_18_3_455_0/}
}