R. Khaldi  , F. Aggoune  , 
    On Extremal Polynomials on a System of Curves and Arcs,
    Journal of Engineering and Applied Sciences,
    Volume 2,Issue 2,
    2007,
    Pages 372-376,
    ISSN 1816-949x,
    jeasci.2007.372.376,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2007.372.376)
    Abstract: Strong asymptotic is given for a sequence of extremal polynomials with respect to a Szegö measure supported on a system of a rectifiable Jordan curves and arcs and perturbed by an infinite Blaschke sequence of point masses.
    Keywords: Asymptotic behavior;orthogonal polynomials;capacity logarithmic;green function