Gagandeep  Singh, 
    Hankel Determinant for Analytic Functions with Respect to Other Points,
    Journal of Modern Mathematics and Statistics,
    Volume 7,Issue 4,
    2013,
    Pages 37-40,
    ISSN 1994-5388,
    jmmstat.2013.37.40,
    (https://makhillpublications.co/view-article.php?doi=jmmstat.2013.37.40)
    Abstract: This study is concerned with the estimate of second Hankel 
  determinant for the classes of analytic-univalent functions with respect to 
  conjugate points and with respect to symmetric conjugate points in the unit 
  disc <img src="http://docsdrive.com/images/medwelljournals/jmmstat/2013/img3-2k13-37-40.gif" width="82" height="20" align="absmiddle">.
    Keywords: Analytic functions;starlike functions with respect to conjugate points;starlike functions;convex functions with respect to symmetric conjugate points;Hankel determinant;coefficient bounds