From William Smith, D.C.L., LL.D., A Dictionary of Greek and Roman Antiquities, John Murray, London, 1875. Not the last word by any means, but useful at least for references to primary works.
- In the Roman comitia the cista was the ballot-box into which the voters cast their tabellae (Plin. H.N. XXXIII.2 s7; Auctor, ad Herenn. i.12; Pseudo-Ascon. ad Cic. Divin. 7 p108, ed. Orelli). 
- (1991) Taylor, L. R. Roman Voting Assemblies From the Hannibalic War to the Dictatorship of Caesar. ISBN 0-472-08125-X
- Voting in Republican Rome Silver Denarius of P. Nerva (113 to 112 BCE) shows voting in the cista.
- Coins Depicting and Commemorating the Secret Ballot
- Voting procedure in Nova Roma