A Hyperbolic Analog of the Phasor Addition Formula. - F. Adrián F. Tojo (Am. Math. Mon., 2016)

On linear differential equations and systems with reflection. - Alberto Cabada; F. Adrián F. Tojo (Appl. Math. Comput., 2017)

Approximation of Stieltjes ordinary differential equations. - Francisco J. Fernández; F. Adrián F. Tojo (CoRR, 2020)