G.  Valenza, Faes, L., Citi, L., Orini, M., and Barbieri, R., ?Instantaneous transfer entropy for the study of cardio-respiratory dynamics?, in Engineering in Medicine and Biology Society (EMBC), 2015 37th Annual International Conference of the IEEE, 2015, pp. 7885?7888. 

M.  Orini, Valenza, G., Citi, L., and Barbieri, R., ?Tetravariate Point-Process Model for the Continuous Characterization of Cardiovascular-Respiratory Dynamics during Passive Postural Changes?, 2012.