Before revision:  Both ODEs and Markov chains and their mutual interaction can be better understood and analysed through the  introduction of the so called Interaction Graph, a con- cept originally invented for time-continuous dynamical systems  [ 4 ].
After revision:  Both ODEs and Markov chains and their mutual interaction can be better understood and analysed through the introduction of the so called Interaction Graph, a con- cept originally invented for time-continuous dynamical systems , see [ 4 ].