APA (7th ed.) Citation

Zhang, X., Liu, L., & Zou, H. (2008). Eigenvalues of fourth-order singular Sturm–Liouville boundary value problems. Elsevier.

Chicago Style (17th ed.) Citation

Zhang, Xinguang, L. Liu, and H. Zou. Eigenvalues of Fourth-order Singular Sturm–Liouville Boundary Value Problems. Elsevier, 2008.

MLA (9th ed.) Citation

Zhang, Xinguang, et al. Eigenvalues of Fourth-order Singular Sturm–Liouville Boundary Value Problems. Elsevier, 2008.