Geometric Estimates of the First Eigenvalue of $(p,q)$-Elliptic Quasilinear System Under Integral Curvature Condition. J. Part. Diff. Eq. [Internet]. 2021 Aug. 23 [cited 2026 Mar. 15];34(4):348-6. Available from: https://gsp.tricubic.dev/jpde/article/view/4358