Ben Amara J., Hedhly J., “Eigenvalue Ratios For Schrodinger Operators With Indefinite Potentials”, Appl. Math. Lett., 76 (2018), 96–102
Olgar H., Muhtarov F.S., Mukhtarov O.Sh., “Lower Bound Estimation For Eigenvalues For Many Interval Bvp'S With Eigenparameter Dependent Boundary Conditions”, AIP Conference Proceedings, 1997, eds. Ashyralyev A., Lukashov A., Sadybekov M., Amer Inst Physics, 2018, UNSP 020037-1
Aliyev Z.S., Guliyeva S.B., “Spectral Properties of a Fourth Order Eigenvalue Problem With Spectral Parameter in the Boundary Conditions”, Filomat, 32:7 (2018), 2421–2431
З. С. Алиев, А. Г. Гейдаров, “Спектральные свойства оператора Штурма–Лиувилля с $\delta$-потенциалом и со спектральным параметром в граничном условии”, Матем. заметки, 101:5 (2017), 792–797 ; Z. S. Aliyev, A. G. Geidarov, “Spectral Properties of the Sturm–Liouville Operator with $\delta$-Potential and with Spectral Parameter in the Boundary Condition”, Math. Notes, 101:5 (2017), 913–918
A. Sh. Shukurov, “On the number of non-real eigenvalues of the Sturm–Liouville problem”, Eurasian Math. J., 8:3 (2017), 77–84
Aliyev Z.S., Guliyeva S.B., “Properties of Natural Frequencies and Harmonic Bending Vibrations of a Rod At One End of Which Is Concentrated Inertial Load”, J. Differ. Equ., 263:9 (2017), 5830–5845
Aryan Mohammed, “Spectral Properties of the Second Order Differential Operators with Eigenvalues Parameter Dependent Boundary Conditions.”, JZS, 19:2 (2017), 221
Meneses R., Orellana O., “on a Sturm-Liouville Problem With Spectral and Physical Parameters in Boundary Conditions”, IMA J. Appl. Math., 81:1 (2016), 100–131
Oktay Mukhtarov, Hayati Olgar, Fahreddin Muhtarov, AIP Conference Proceedings, 1759, 2016, 020044
Aliev Z.S., Dun'yamalieva A.A., “Defect Basis Property of a System of Root Functions of a Sturm-Liouville Problem With Spectral Parameter in the Boundary Conditions”, Differ. Equ., 51:10 (2015), 1249–1266