Kleibergen, \.(. and Paap, R. (2006). Generalized reduced rank tests using the singular value decomposition. Journal of Econometrics, 133(1):97--126.
Francesco Lippi (2006). Monetary union with voluntary participation Review of Economic Studies.
Frank Windmeijer (2005). A finite sample correction for the variance of linear efficient two-step GMM estimators Journal of Econometrics.