1. Chapter 7, Performance Evaluations;Phillips,1995
2. Ball Plate Intercomparison M16,1992
3. Initial performance check of NRLM’s CMM using NML’s 300 mm ball-plate;Yin;Bulletin of NRLM,2000
4. Sonko Osawa, Toshiyuki Takatsuji, Tomizo Kurosawa, Anna Kapinska-Kiszko. Joint experiments on the calibration of the ball-plate by Poland and Japan. accepted for publication in Bulletin of NRLM.
5. E. Trapet, Matthias Franke, Franke Hartig, Heinrich Shwenke, Franz Waldele, Maurice Cox, Alistair Forbes, Frank Delbressine, Piet Schellekens, Michael Trenk, Herbert Meyer, Gunter Moritz, Thomas Guth, Norbert Wanner. Traceability of Coordinate Measurements According to the Method of the Virtual Measuring Machine, Part 2 of the Final Project MAT1-CT94-0076, sponsored by European Commission under the Standards, Measurements, and Testing Programme. Braunshweig, Germany: PTB, 1999.