Ayesha Y. Ahmad, Imane A. Saleh, Perumal Balakrishnan, Mohammad A. Al-Ghouti (2021), Comparison GIS-Based interpolation methods for mapping groundwater quality in the state of Qatar, Groundwater for Sustainable Development, Volume 13, 100573, ISSN 2352-801X, https://doi.org/10.1016/j.gsd.2021.100573
Imane Ali Saleh and Perumal Balakrishnan (2019), GIS Based Hotspot and Cold-spot Analysis for Primary Education in India, Indian Journal of Science and Technology, Vol 12(45), pp.1-33. DOI: 10.17485/ijst/2019/v12i45/148448, ISSN: 0974-5645.
Balakrishnan. P, Mohammed Harish & Mohammed Khalifa M.Z. Al-Kuwari (2018), Urban Solid Waste Management using Geographic Information Systems (GIS): A Case Study in Doha, Qatar, International Journal of Advanced Remote Sensing & GIS, Vol.8(1), pp.2901-2918. Cloud Publications, (ISSN 2320 – 0243) https://doi.org/10.23953/cloud.ijarsg.397.
Noora Al-Naimi, Mohammad A Al-Ghouti & Perumal Balakrishnan (2016), Investigating chlorophyll and nitrogen levels of mangroves at Al-Khor, Qatar: an integrated chemical analysis and remote sensing approach, Environmental Monitoring and Assessment, 188 (5) 1-12. Springer International Publishing.
Mohamed A. Amr, Abdul-Fattah I. Helal , Athab T. Al-Kinani & Perumal Balakrishnan (2016), Ultra-trace determination of 90Sr, 137Cs, 238Pu, 239Pu, and 240Pu by triple quadruple collision/reaction cell-ICP-MS/MS: Establishing a baseline for global fallout in Qatar soil and sediments, Journal of Environmental Radioactivity 153,73–87, Elsevier, http://dx.doi.org/10.1016/j.jenvrad.2015.12.008.
Noora Al-Naimi, Perumal Balakrishnan & Ipek Goktepe (2015), Measurement and modelling of nitrogen dioxide (NO2) emissions: a marker for traffic-related air pollution in Doha, Qatar, Annals of GIS, 21(3), 249-259, Taylor & Francis, DOI: 10.1080/19475683.2015.1057225.
Nadeem Hashem & Perumal Balakrishnan (2015), Change analysis of land use/land cover and modelling urban growth in Greater Doha, Qatar, Annals of GIS, 21(3), 233-247, Taylor & Francis, DOI:10.1080/19475683.2014.992369.