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APA Citation
Apel, T., Nicaise, S., & Pfefferer, J. (n.d.). discretization of the Poisson equation with non‐smooth data and emphasis on non‐convex domains. Numerical methods for partial differential equations, 32(5), 1433–1454. http://access.bl.uk/ark:/81055/vdc_100034749490.0x00004f