Cited passages: A. H. Techet, Free Surface Water Waves, Fall 2004, §II–III, equation 3.2 and §VI: finite-depth dispersion and its limits; A. H. Techet, Free Surface Water Waves, §VI, equations 6.8–6.11: group/phase ratio and depth limits.
Cited passages: A. H. Techet, Waves, phase speed, and group speed, Fall 2003, tasks 2–5 and write-up: depth comparison, crest disappearance and probe records.