Kopzhassarova, A., & Sarsenbi, A. Basis Properties of Eigenfunctions of Second-Order Differential Operators with Involution. Wiley.
Chicago Style (17th ed.) CitationKopzhassarova, Asylzat, and Abdizhakhan Sarsenbi. Basis Properties of Eigenfunctions of Second-Order Differential Operators with Involution. Wiley.
MLA (9th ed.) CitationKopzhassarova, Asylzat, and Abdizhakhan Sarsenbi. Basis Properties of Eigenfunctions of Second-Order Differential Operators with Involution. Wiley.
Warning: These citations may not always be 100% accurate.