A New Graphical Method for Encryption of Computer Data. - Charles Schwartz (Cryptologia, 1991)

A system-theoretic formulation of the bunch train cavity interaction. - Charles Schwartz; Abraham H. Haddad (ACC, 2002)

An upper stability bound for singularly-perturbed delta-operator formulated discrete-time systems. - Charles Schwartz; Abraham H. Haddad (CDC, 2002)

Stability criteria for linear periodic switched systems. - Charles Schwartz; Abraham H. Haddad (ACC, 2003)

Control of jump linear systems having semi-Markov sojourn times. - Charles Schwartz; Abraham H. Haddad (CDC, 2003)

A Consistent Theory of Tachyons with Interesting Physics for Neutrinos. - Charles Schwartz (Symmetry, 2022)

Tachyon Interactions. - Charles Schwartz (Symmetry, 2023)