Phase-Locked Loops Used with Masers: Atomic Frequency Standards. - Jacques Vanier; Michel Tetu (IEEE Trans. Commun., 1982)

Automatic locking of a 633 nm semiconductor laser on iodine. - Jean-François Cliche; Alain Zarka; Michel Tetu; Jean-Marie Chartier (IEEE Trans. Instrum. Meas., 1999)