5. Conservation and Restauration of Statues on Easter Island - Laboratory Experiments and Proposals for the Consolidation of the Statues. Peter Friese and E. Wendler
6. Modification of the Reinforcing Agent Suitable for Each Degree of Damage on Moai Statue. Masaaki Sawada, Mónica Bahamondez,, Saihachi Inoue y Yoshihiro Araki