Steele, R.; Esdale, D.J.; Goodman, D.J.: 'Partial correction of transmission errors in d.p.c.m. without recourse to error correction coding', Electronics Letters, 1977, 13, (12), p. 351-353, DOI: 10.1049/el:19770256
IET Digital Library, https://digital-library.theiet.org/;jsessionid=3hqeljn0t6jba.x-iet-live-01content/journals/10.1049/el_19770256