@article{JCA_2003_10_1_JCA_2003_10_1_a9,
     author = {A. El Biari and R. Ellaia and M. Raissouli},
     title = {Stability of {Geometric} and {Harmonic} {Functional} {Means}},
     journal = {Journal of convex analysis},
     pages = {199--21},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {2003},
     url = {http://geodesic.mathdoc.fr/item/JCA_2003_10_1_JCA_2003_10_1_a9/}
}