In 1999 Gwendolina Gschwendner co-published with E. Karamountzou and B.Birkel in the series Label (ETIKETT) »Die blaue Stunde. Tee in Weltliteratur«: »But equal, if the inclined reader only looks in to ourcollection, or if he or she read through more pages: the tea will be fitting for every amount of time.«