1. ABAQUS—user's manual. (1989a). Hibbitt Karlsson & Sorensen Inc. ABAQUS—theory manual; version 4.8 . (1989). Hibbitt Karlsson & Sorensen Inc. Pawtucket United Kingdom.
2. Buettner D. R. and Becker R. J. (1985). PCI manual for the design of hollow core slabs . Prestressed Concrete Institute Chicago Ill.
3. Floors of precast prestressed hollow core elements; CEN TC 229 . (1992). European Committee for Standardization Paris France.
4. “Hollow core slab application advance.” (1986). World Constr. 39(10) 38–41.