  In view of the interpretation of data collected by large, deep underground
experiments in terms of primary Cosmic Ray physics, this work is focused on the
study of the production of of TeV muons in Extensive Air Showers. The review
tries to point out those features of hadronic interactions that mostly affect
the production of the high energy muons. A few different Monte Carlo codes are
compared, with a particular attention to those based on the Regge-Gribov
framework. The possibility of performing experimental tests of the proposed
models is also briefly discussed.

High Energy Physics - Phenomenology;Astrophysics