[805] Tandem, Felix, Pseudonym von Karl Spitteler (s.d.).
Brockhaus-1911: Tandem · Quoúsque tandem
Herder-1854: Tandem [2] · Tandem [1] · Quousque tandem
Lueger-1904: Tandem
Meyers-1905: Tandem · Quŏusque tandem
Pierer-1857: Tandem · Quousque tandem