This paper deals with the sufficient conditions
for controllability and observability characters of finitedimensional
linear continuous-time-invariant systems of serial
and parallel concatenated systems. The obtained conditions
depend on the controllability and observability of the systems
and in some cases, the functional output-controllability of the
CitacióGarcia-Planas, M.I.; Domínguez, J.; Um, L. E. Sufficient conditions for controllability and observability of serial and parallel concatenated linear systems. "INTERNATIONAL JOURNAL OF CIRCUITS, SYSTEMS AND SIGNAL PROCESSING", 30 Novembre 2014, vol. 8, p. 622-630.