Gert Doering's mgetty+sendfax web site: https://wais.leo.org/~doering/mgetty/index.html
Horst F.'s web site: https://www.boerde.de/~horstf
Linux Journal: https://www.linuxjournal.com/
Official mgetty+sendfax Distribution at Metalab: ftp://metalab.unc.edu/pub/linux/system/serial/getty/
Salmar Consulting Inc.'s web site: https://www.salmar.com/
Samba Organization web site: https://www.samba.org/