Relations among eigenvalues of left-definite Sturm-Liouville problems with coupled BCS and separated BCS. - YanXia Zhang; Xuefeng Zhang (J. Comput. Appl. Math., 2012)

The intersection of the spectra of two Sturm-Liouville equations. - YanXia Zhang; ZhongZhi Wang; Xuefeng Zhang (Appl. Math. Comput., 2013)

Oscillation problem of Left-Definite Sturm-Liouville Problems with coupled BCs. - YanXia Zhang; Xuefeng Zhang; ZhongZhi Wang (Appl. Math. Comput., 2013)