Preece, R.C.; Kaminski, M.A.; Dignes, T.W.; (2001) Popovia johnrolandi n.sp., a new smaller agglutinated foraminifera from northern Venezuela: a biostratigraphic example of the second law of thermodynamics. In: Hart, M. and Kaminski, M.A. and Smart, C., (eds.) Proceedings of the Fifth International Workshop on Agglutinated Foraminifera: (Plymouth, U.K., September 6-16, 1997). (pp. pp. 403-410). Grzybowski Foundation: London, UK.