?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=J&rft.au=Galkowski%2C+J&rft.aulast=Galkowski&rft.atitle=Sharp+Preasymptotic+Error+Bounds+for+the+Helmholtz+h-FEM&rft.volume=63&rft.date=February+2025&rft.issue=1&rft.pages=1-22&rft.issn=1095-7170&rft.title=SIAM+Journal+on+Numerical+Analysis&rft.genre=article