 Zhu and Cao published a paper in the June 2006 issue of the "Asian Journal of Mathematics" with an exposition of the complete proof of the Poincaré and geometrization conjectures.They initially implied the proof was their own achievement based on the "Hamilton-Perelman theory", but later retracted the original version of their paper, and posted a revised version, in which they referred to their work as the more modest "exposition of Hamilton–Perelman's proof".They also published an erratum disclosing that they had forgotten to cite properly the previous work of Kleiner and Lott published in 2003.