- J. Evan, “Superconformally covariant linear system for N = 3,4 supersymmetric Yang-Mills theory in four dimensions”, Physics Letters B, 190, no. 1-2, 1987,
110 
- V. A. Yatsun, “On quasi-self-dual fields in N=4 supersymmetric Yang-Mills theory”, Lett Math Phys, 15, no. 1, 1988,
7 - V.S. Vladimirov, World Congress of Nonlinear Analysts '92, 1996,
3069