by Förg-Rob, Wolfgang, Girstmair, Kurt
Published in Mathematische Semesterberichte (01.03.2022)

by Brzdk, Janusz, El-hady, El-sayed, g-Rob, Wolfgang, Leniak, Zbigniew
Published in Aequationes mathematicae (01.08.2016)

by g-Rob, Wolfgang
Published in ESAIM. Proceedings (01.11.2014)

by g-Rob, Wolfgang, Krapez, Aleksandar
Published in Aequationes mathematicae (01.09.2005)