Schaffrin, B.(1994).(Schaffrin, B. (1994). Adjustment computations I, Class notes, Department of Geodetic Science and Surveying, The Ohio State University, US.).
Schaffrin, B.(1995).(Schaffrin, B. (1995). Adjustment computations II, Class notes, Department of Geodetic Science and Surveying, The Ohio State University, US.).
Förstner, W.(1987).Reliability analysis of parameter estimation in linear models with applications to mensuration problems in computer vision, Computer Vision.Graphics and Image Processing.40,273-310.