Hello guys, im looking for the original article of Van der Pol. B. van der Pol, "The nonlinear theory of electric oscillations," Proc. IRE, vol. 22, pp. 1051--1086, Sept. 1934. do you have an idea of where i can find it? (online , or what does proc. IRE means?) The main idea is to find out how does the non linear potential arrives when modeling the RLC circuit that generates the Van der Pol equation. Any reference would help. Thx guys.