Ziggah, Y. Y., H. Youjian, C. A. Odutola, and T. T. Nguyen. “ACCURACY ASSESSMENT OF CENTROID COMPUTATION METHODS IN PRECISE GPS COORDINATES TRANSFORMATION PARAMETERS DETERMINATION - A CASE STUDY, GHANA”. European Scientific Journal, ESJ, Vol. 9, no. 15, May 2013, doi:10.19044/esj.2013.v9n15p%p.