1. Eljárás eleveniszap aktivitásának aerob körülmények között, nyitott rendszerben való mérésére;Farkas;Vituki Beszámoló,1967
2. Method for measuring aerobic decomposition activity of activated sludge in an open air system;Farkas,1968
3. Hydrolysis of condensed phosphates during aerobic biological sewage treatment;Finstein;Water Research,1967
4. Hydrolysis of condensed phosphates in wastewater;Heinke,1969
5. The pathways of phosphorus in biological treatment processes;Jenkins,1968