[1145] τρι-όροφος, statt τριώροφος, Her. 1, 180.
Heiligenlexikon-1858: Kai-Tri
Herder-1854: Tri · Regula de Tri
Meyers-1905: Regŭla de tri · De tri
Pierer-1857: Regula de tri · Regel de tri