AT. Goguitchaichvili, D.Z. Sologachvili, M. Prevot, M. Calvo, E. Sh. Pavlenichvili, G.M. Maissuradze, and E. Schnepp. “Palaeomagnetic and Rock-Magnetic Study of a Pliocene Volcanic Section in Southern Georgia (Caucasus)”. Netherlands Journal of Geosciences, vol. 76, Jan. 1997, pp. 135-43, https://njgjournal.nl/index.php/njg/article/view/12338.