Invariance in the Class of Weighted Power Means. - Iulia Costin (SYNASC, 2007)

Complementaries of Greek Means with Respect to the Logarithmic Mean. - Iulia Costin (SYNASC, 2008)

A Nice Separation of Some Seiffert-Type Means by Power Means. - Iulia Costin; Gheorghe Toader (Int. J. Math. Math. Sci., 2012)

Optimal evaluations of some Seiffert-type means by power means. - Iulia Costin; Gheorghe Toader (Appl. Math. Comput., 2013)

Optimal Estimations of Seiffert-Type Means By Some Special Gini Means. - Iulia Costin; Gheorghe Toader (CASC, 2014)