The behaviour of subharmonics in a non-linear system and its application to binary storage devices. - Trevor Pearcey; F. Hirst; P. G. Thorne (IFIP Congress (2), 1968)

Computer Elucidation of the Occurence of Third Subharmonic Motion and Other Releated Phenomena. - F. Hirst (Jerusalem Conference on Information Technology, 1978)

Computer Elucidation of the Occurrence of Higher Odd Subharmonic Motion and Other Subharmonic Phenomena. - F. Hirst; P. Hawryszkiewycz (Aust. Comput. J., 1980)