VI. Nonlinear boundary value problems (Perturbation theory)
Differential and Integral Equations, GDML_Books, (1979), p. 209-238 / Harvested from
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@inbook{400401,
     title = {VI. Nonlinear boundary value problems (Perturbation theory)},
     booktitle = {Differential and Integral Equations},
     series = {GDML\_Books},
     publisher = {Academia},
     address = {Praha},
     year = {1979},
     pages = {209-238},
     url = {http://dml.mathdoc.fr/item/400401}
}

 (éd.). VI. Nonlinear boundary value problems (Perturbation theory), dans Differential and Integral Equations, GDML_Books,  (1979), pp. 209-238. http://gdmltest.u-ga.fr/item/400401/