Eckhaus, W. (1973). Matched asymptotic expansions and singular perturbations. North-Holland Pub. Co. ; American Elsevier Pub. Co..
Lua i Stíl Chicago (17ú heag.)Eckhaus, Wiktor. Matched Asymptotic Expansions and Singular Perturbations. Amsterdam : New York: North-Holland Pub. Co. ; American Elsevier Pub. Co., 1973.
Lua MLA (8ú heag.)Eckhaus, Wiktor. Matched Asymptotic Expansions and Singular Perturbations. North-Holland Pub. Co. ; American Elsevier Pub. Co., 1973.
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