Borking, J. J. (1985). Third party protection of software and firmware: Direct protection of zeros and ones. North-Holland ; Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co..

Borking, John J. Third Party Protection of Software and Firmware: Direct Protection of Zeros and Ones. Amsterdam ; New York : New York, N.Y., U.S.A.: North-Holland ; Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co., 1985.

Borking, John J. Third Party Protection of Software and Firmware: Direct Protection of Zeros and Ones. North-Holland ; Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co., 1985.