Melenk JM, Babuška I. Approximation with harmonic and generalized harmonic polynomials in the partition of unity method. CAMES [Internet]. 2023 Jun. 19 [cited 2025 Apr. 19];4(3-4):607-32. Available from: https://cames3.ippt.pan.pl/index.php/cames/article/view/1394