1. Balogh, K., B. Molnár, M. Szónoky 1968: Research report to the OKGT (former Hungarian Oil and Gas Company). - Department of Geology and Paleontology, University of Szeged, 477 p.
2. A geological cyclicity detected by means of polarity coincidence correlation;B. Carrs;Nature,1966
3. Computer techniques in geology. -;F. Agterberg;Earth-Sci. Rev.,1967
4. Harmonic analysis of varve time series. -;R. Anderson;J. Geophys. Res.,1963