Vaidyanathan, S. & Ram, S. Impact of the Tsunami on Coastal Ecosystems and Human Communities. in Studies on Vulnerability and Habitat Restoration along the Coromandel Coast 33–60, (Foundation for Ecological Research, Advocacy and Learning, 2008).

Vaidyanathan, S., Andrew, B., Alexander, K. & Ram, S. Coastal Bio-shields and their Putative Role During Large Weather Related Disturbance Events. in Studies on Vulnerability and Habitat Restoration along the Coromandel Coast (Foundation for Ecological Research, Advocacy and Learning, 2008).

Ram, S., Vaidyanathan, S. & Venugopal, D. Estimating herbivore densities in the habitat mosaic of Kalakad-Mundanthurai Tiger Reserve. Final Technical Report. (Foundation for Ecological Research Advocacy and Learning, 2006).

Ram, S. & Vaidyanathan, S. Distribution and Status of the Nilgiri Langur (Semnopithecus johnii) in the Western Ghats, India. Final Technical Report. (Foundation for Ecological Research Advocacy and Learning, 2006).

Vaidyanathan, S., Athreye, D., Gangaraju, S., Kamalraj, S. & Ram, S. Baseline estimates of the presence, distribution, and abundance of wildlife populations in the Kodaikanal Wildlife Sanctuary, southern India. (Foundation for Ecological Research, Advocacy and Learning, 2021).

Sinha, A., Mukhopadhyay, K., Datta-Roy, A. & Ram, S. Ecology proposes, behaviour disposes: ecological variability in social organization and male behavioural strategies among wild bonnet macaques. Current Science 89, 1166–1179, (2005).

Ram, S., Venkatachalam, S. & Sinha, A. Changing social strategies of wild female bonnet macaques during natural foraging and on provisioning. Current Science 84, 780–790, (2003).

Ram, S. & Vaidyanathan, S. Comments on the current geographical distribution of the Nilgiri langur (Trachypithecus johnii, Fischer) in Kerala, India. Asian Primates 7, 17–18, (2001).

De Moor, D. et al. MacaqueNet: Advancing comparative behavioural research through large-scale collaboration. Journal of Animal Ecology n/a, (2025).