The first one is by his close associate Bao Tong, a former Director of the Office of Political Reform of the CPC Central Committee, Secretary to Zhao Ziyang, and the Premier of the State Council, from 1980 to 1985, as published in AsiaMedia, a project of the UCLA Asia Institute.
The second one is by Orville Schell, dean of the University of California at Berkeley's Graduate School of Journalism, as published in the Daily Times.