Brzezińska, Karolina, and Andrzej Szychowski. “The Influence of Rotational Flexibility of Beam-Column Connection on Roof Plane Rigidity of Energy-Active Cover of Frame-Purlin Hall”. Budownictwo I Architektura, vol. 12, no. 2, June 2013, pp. 197-04, doi:10.35784/bud-arch.2130.