Ragauskas, A., E. Kalvaitis, V. Petkus, G. Daubaris, and B. Depreitere. “Analysis of Cerebrovascular Autoregulation Reactivity Index Electronic Monitoring Methods”. Elektronika Ir Elektrotechnika, vol. 114, no. 8, Oct. 2011, pp. 16-20, doi:10.5755/j01.eee.114.8.687.