Sabelli R, Griffis L. Technical Note: Internal Second-Order Stiffness: A Refined Approach to the Rm Coefficient to Account for the Influence of P-? on P-?. Eng J [Internet]. 2021 Jun. 30 [cited 2024 Oct. 9];58(2):139-46. Available from: https://ej.aisc.org/index.php/engj/article/view/1173