@InCollection{zbMATH05082969,
Author = {John R. {Graef} and Chuanxi {Qian} and Bo {Yang}},
Title = {{Positive solutions to boundary value problems for ordinary differential equations.}},
BookTitle = {{Colloquium on differential and difference equations, CDDE 2002. Proceedings of the colloquium held in Brno, Czech Republic, September 4--6, 2002}},
ISBN = {80-210-3149-2/pbk},
Pages = {129--144},
Year = {2003},
Publisher = {Brno: Masaryk University},
Language = {English},
MSC2010 = {34B18 34B15},
Zbl = {1111.34313}
}