Melenk JM, Babuška I. Approximation with harmonic and generalized harmonic polynomials in the partition of unity method. Comp. Assist. Methods Eng. Sci. [Internet]. 2023 Jun. 19 [cited 2025 Jun. 30];4(3-4):607-32. Available from: https://cames.ippt.pan.pl/index.php/cames/article/view/1394