@article{10_4064_sm_44_4_335_344,
     author = {T. Flett},
     title = {Some applications of {Zygmund's} lemma to nonlinear differential equations in {Banach} and {Hilbert} spaces},
     journal = {Studia Mathematica},
     pages = {335--344},
     publisher = {mathdoc},
     volume = {44},
     number = {4},
     year = {1972},
     doi = {10.4064/sm-44-4-335-344},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-44-4-335-344/}
}