Figure 1.

Graphic of the successive approximations<a onClick="popup('http://www.boundaryvalueproblems.com/content/2013/1/12/mathml/M272','MathML',630,470);return false;" target="_blank" href="http://www.boundaryvalueproblems.com/content/2013/1/12/mathml/M272">View MathML</a>and<a onClick="popup('http://www.boundaryvalueproblems.com/content/2013/1/12/mathml/M273','MathML',630,470);return false;" target="_blank" href="http://www.boundaryvalueproblems.com/content/2013/1/12/mathml/M273">View MathML</a>,<a onClick="popup('http://www.boundaryvalueproblems.com/content/2013/1/12/mathml/M274','MathML',630,470);return false;" target="_blank" href="http://www.boundaryvalueproblems.com/content/2013/1/12/mathml/M274">View MathML</a>.

Hristova et al. Boundary Value Problems 2013 2013:12   doi:10.1186/1687-2770-2013-12
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