Two measures on Cantor sets. - Gökalp Alpan; Alexander Goncharov (J. Approx. Theory, 2014)

Asymptotic Properties of Jacobi Matrices for a Family of Fractal Measures. - Gökalp Alpan; Alexander Goncharov; Ahmet Nihat Simsek (Exp. Math., 2018)

Szegő's condition on compact subsets of ℂ. - Gökalp Alpan (J. Approx. Theory, 2019)

On the Widom factors for Lp extremal polynomials. - Gökalp Alpan; Maxim Zinchenko (J. Approx. Theory, 2020)

Extremal polynomials on a Jordan arc. - Gökalp Alpan (J. Approx. Theory, 2022)

Widom factors in ℂn. - Gökalp Alpan; Turgay Bayraktar; Norm Levenberg (J. Approx. Theory, 2026)