Mușinschi L, Pricop V. The ordinary Hilbert series for Sibirsky graded algebras of the differential system s(5,7). ActaEX [Internet]. 2026Jul.23 [cited 2026Sep.21];21(1):117-23. Available from: https://revistaust.upsc.md/index.php/acta_exacte/article/view/1328