1. C.S. Owen J.C. Silvia L. D’Angelo P.A. Liberti Magnetic-polymer particles, US Patent 5 866 099, assigned to Nycomed Imaging AS (Oslo, NO), February 2, 1999
2. K. Kasai M. Hattori K. Han Magnetic polymer particle and process for manufacturing the same, US Patent 5 814 687, assigned to JSR Corporation (Tokyo, JP), September 29, 1998
3. J. Ugelstad T. Ellingsen A. Berge O.B. Helgee Magnetic polymer particles and process for the preparation thereof, US Patent 4 654 267, assigned to SINTEF (Trondheim, NO), March 31, 1987
4. J. Shan L. Wang H. Yu J. Ji W.A. Amer Y. Chen G. Jing H. Khalid M. Akram N.M. Abbasi Mater. Sci. Technol. , August 2015
5. J. Ugelstad T. Ellingsen A. Berge O.B. Helgee Process for preparing magnetic polymer particles, US Patent 4 774 265, assigned to Sintef (Trondheim, NO), September 27, 1988