1. Lee, J. et al., 1998a, “Novel NDI by Use of Magneto-Optical Film,”Transactions of the Japan Society of Mechanical Engineers, Vol. 64, No. 619, pp. 825–830.
2. Lee, J. et al., 1998b, “Nondestructive Inspection for the Paramagnetic Materials Using the Magneto-Optical NDI System,”Journal of the Japan Society of Applied Electromagnetics and Mechanics, Vol. 6, No. 4, pp. 337–342.
3. Lee, J. et al., 2000,“An Algorithm for the Characterization of Surface Crack by Use of Dipole Model and Magneto-Optical Non-Destructive Inspection System,”KSME International Journal, Vol. 14, No. 10, pp. 1072–1080.
4. Lee, J. et al., 2001, “Development of Magnetic Camera Using 2-D Arrayed Hall Elements,” Proc. APCFS & ATEM’01, pp. 222–227.
5. Lee, J. et al., 2004a, “Magnetic Flux Density Apparatus for, E.G., Detecting an Internal Crack of a Metal or a Shape of the Metal,” US patents 6,683,452 B2.