(private-note)Cited by Mami\,s & Köksal (1996).
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(private-note)Holdings: pers. (ordered from betterworld 2011-08-04, 11.53 AUD, arr. 08-23)
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Example 9.3-1 (pp. 397--398) is undetermined and for any C has the exact solution G = C sqrt(2), C/sqrt(2). The numerical solution is near this plane.