1. Ny metode for bestemmelse av vannforingen i naturlige og kunstige vannlop — den relative fortynningsmetode;Aastad;Tek. Ukebl., Arg.,1928
2. Discharge measurements by means of a salt solution, “the relative salt dilution”;Aastad;Int. Assoc. Sci. Hydrol., Assem. Int. Hydrol. Rome, Publ. No. 38,1954
3. The salt velocity method of water measurement;Allan;Am. Soc. Mech. Eng., Trans.,1923
4. Il mettodo chimico-elettrico per la misura delle portate dei corsi d'aqua;Barbagelata;Elettrotecnica (Assoc. Elettrotec. Ital.),1926
5. Chemical-electrical measurement of water;Barbagelata,1928