@article{3064869,
    title = "Refined generalizations of the triangle inequality on banach spaces",
    author = "Takahasi, S.-E. and Rassias, J.M. and Saitoh, S. and Takahashi, Y.",
    journal = "Mathematical Inequalities and Applications",
    year = "2010",
    volume = "13",
    number = "4",
    pages = "733-741",
    publisher = "Element D.O.O.",
    issn = "1331-4343, 1848-9966",
    doi = "10.7153/mia-13-52",
    abstract = "Let X be a complex Banach space and p a real number with p ≥ 1. We give a necessary and sufficient condition for complex numbers a, b and real numbers λ, μ and μ in order that the inequality [Equation presented] holds for every x, y ∈ X."
}