@inproceedings{1055280,
    title = "A model with tension softening for concrete beams under combined torsion, flexure, shear and prestressing",
    author = "Καραγιάννης , Κωνσταντίνος Γ.",
    year = "1994",
    pages = "161-167",
    publisher = "Civil-Comp Press",
    booktitle = "Advances in finite element techniques"
}