1. Dermidjian Sevak, Stability of castellated beam webs, 1999, PhD Thesis for master degree of engineering.
2. REDWOOD RG. Analyse et dimensionnement des poutres ayant des ouvertures dans les âmes. Revue Construction métallique (CTICM) 1978; 3:15-27.
3. DARWIN D. Design of Steel and Composite Beams with Web Openings, Design Guide 2, AISC, 3ème edition, 65 pages; 2003.
4. CHUNG KF, LIU TCH, KO ACH. Investigation on Vierendeel Mechanism in steel beams with circular web openings. Journal of Constructional Steel Research 2001; 5(57):467-490.
5. LAWSON RM. Design for openings in the webs of composite beams, Steel Construction institute Publication 068; 1987,.