A comparison theorem for super- and subsolutions of $\nabla^2u+f(u)=0$ and its application to water waves with vorticity
V. Kozlov, N. G. Kuznetsov

This publication is cited in the following articles:

1. D. E. Apushkinskaya, A. I. Nazarov, “The normal derivative lemma and surrounding issues”, Russian Math. Surveys, 77:2 (2022), 189–249              
2. Kozlov V., Nazarov A., “A Comparison Theorem For Nonsmooth Nonlinear Operators”, Potential Anal., 54:3 (2021), 471–481        
3. D. E. Apushkinskaya, A. I. Nazarov, “On the boundary point principle for divergence-type equations”, Rend. Lincei-Mat. Appl., 30:4 (2019), 677–699