On Non-Linear Differential Equations of the Second Order: I. the Equation y¨ − k (1-y 2 )y˙ + y = b λk cos(λl + α), k Large
- 1 June 1945
- journal article
- Published by Wiley in Journal of the London Mathematical Society
- Vol. s1-20 (3) , 180-189
- https://doi.org/10.1112/jlms/s1-20.3.180