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Nagaraj, Nithin , and Karthi Balasubramanian. 2017. “Measuring Complexity of Chaotic Systems with Cybernetics Applications”. In Handbook of Research on Applied Cybernetics and Systems Science, Handbook of Research on Applied Cybernetics and Systems Science, IGI Global Information Science Reference, 301-334. http://www.igi-global.com/book/handbook-research-applied-cybernetics-systems/176081.

Nagaraj, Nithin , and Karthi Balasubramanian. 2017. “Three perspectives on complexity: entropy, compression, subsymmetry”. The European Physical Journal Special Topics 226(15): 3251-3272. https://link.springer.com/article/10.1140/epjst/e2016-60347-2.

Balasubramanian, Karthi , Harikumar K, Nithin Nagaraj, and Sandipan Pati. 2017. “Vagus Nerve Stimulation Modulates Complexity of Heart Rate Variability Differently during Sleep and Wakefulness”. Annals of Indian Academy of Neurology 20(4): 403-407. http://www.annalsofian.org/temp/AnnIndianAcadNeurol204403-2598627_004318.pdf.

Balasubramanian, Karthi , and Nithin Nagaraj. 2016. “Aging and cardiovascular complexity: effect of the length of RR tachograms”. PeerJ 4(e275). https://peerj.com/articles/2755.pdf.

Nagaraj, N. , Karthi Balasubramanian, and S. Dey. 2013. “A new complexity measure for time series analysis and classification”. European Physical Journal - Special Topics 222: 847–860. http://eprints.nias.res.in/398/.