1. On the theoretical accuracy of planimetric block triangulation;Ackermann;Photogram-metria,1966
2. Ackermann , F. et al. 1973 Proceedings of the OEEPE symposium on experimental research on accuracy of aerial triangulation (Brussels, June 1973) Institut für Angewandte Gcodäsie, Frankfurt am Main 350
3. Boniface , P. R. J. 1971 Recent research into block adjustment methods at Aircraft Operating Company Proceedings of ISP Commission III symposium 274
4. An experiment in adjustments using super-wide angle photography taken for topographic mapping;Brazier;Photogrammetric Record,1970
5. Triangulation with super-wide angle photographs;Derenyi;Photogrammetric Engineering,1972