Schuh, C., Raudabaugh, J. L., Kromoser, R., Strohmer, M. F., Triplat, A., & Pearce, J. (2020). The Purchasing Chessboard. 3rd ed. 2017. Springer New York.

Schuh, Christian, Joseph L. Raudabaugh, Robert Kromoser, Michael F. Strohmer, Alenka Triplat, و James Pearce. The Purchasing Chessboard. 3rd Ed. 2017. Springer New York, 2020.

Schuh, Christian, et al. The Purchasing Chessboard. 3rd Ed. 2017. Springer New York, 2020.