| Sreenikethan G, Harikumar P S and Maheesan P M (2007), Process of Nitrification in Constructed Wetland Having Vertical Flow Beds, Eco-Chronicle,Vol 2(4) |
| Harikumar, P. S (2006) "Environmental Status of Kol Wetland System of Thrissur District with Special Reference to Water and Sediment Quality."Ecology Environment and Conservation 12.2, 262. |
| Harikumar, P. S., and K. Madhavan. "Estimation of Water Pollution and Assimilative Capacity of River Pamba, Kerala." POLLUTION RESEARCH 25.4 (2006): 707. |
| Harikumar P S(2005) Indigenous Technologies for Drinking Water Treatment, Folkore Research Journal, 15, June |
| K.J.Shiny, K.N.Remani, E Nirmala, T.K.Jalaja and V.K.Sashidharan.(2005).Biotreatment ofWastewater Using aquatic invertebrates, Daphnia magna and Paramecium caudatum.International Journal of Bioresources Technology, Vol.96(1), PP 5558. |
| K.J.Shiny, K.N.Remani, T.K.Jalaja and V.K.Sasidharan(2004). Removal of Chromium by two aquatic pteridophytes. Journal of Environmental Science and Engineering. Vol.46, No.3, pp 249 – 251 |
| Remani, K. N, Harikumar P. S, and Shiny K. J (2004) Ecological status of Chitrapuzha river with reference to discharge of Industrial effluents in Cochin Area., Ecology Environment and Conservation 10 183-186. |
| Harikumar, P. S., Madhavan, K., & Khan, A. B. (2000). Water quality problems of Kerala with special reference to fluoride. Ecology Environment and Conservation, 6, 245-249. |
| K.J.Shiny, Nirmala.ET.K.Jalaja, K.N.Remani (2000). Development of Biological Models for water purification using Aquatic FaunaJournal of Environmental Science and Engineering. Vol.46, No.3, pp 249 – 251. |
| Lakshmi, K, Narayanan Unni P N and Harikumar P S (2000) "Environmental Status of the Mangrove Ecosystem in Valapattanam River Basin, Kerala." Ecology, Environment & Conservation 6.4 : 363-371 |
| Harikumar P S, Narayanan p and Sivasankara Pillai(1988), Cyclic Voltammetric Studies on Electrocatalysis by Plasma Treated Cobalt Phthalocyanine, Bulletin of Electrochemistry (4), 233-236 |
| Harikumar P S and Sivasankara Pillai V N (1990) Mediation of Elcetron Transfer by Cobalt Tetrasulphopthalocyanaine Incorporated poly(o-toluidine) (1990), Bulletin of Electrochemistry, 6. |
| Harikumar P S and Sivasankara Pillai V N (1990) Oxidative transformation in iodine doped cobalt phthalocyanine Journal of Materials Science Letters November 1990, Volume 9, Issue 11, pp 1324-1325 |
| Harikumr P S and Sivasankara Pillai V N Doping Enhanced Electrical Conductivity and Electrocatalytic Activity by Cobalt Phtalocyanaine (1989) Journal of Material Science Letters (8) 969 |
| Drissia T K, 2019, Spatial and Temporal Variation of Water Stress in Bharathapuzha River Basin, Kerala, India, Journal of The Institution of Engineers (India): Series A, vol. 100, no. 1, pp 167–175. https://doi.org/10.1007/s40030-018-0336-1 |
| Drissia, T.K., Jothiprakash, V. & Anitha, A.B. (2019) Flood Frequency Analysis Using L Moments: a Comparison between At-Site and Regional Approach, Water Resour Manage, Vol.33 (3): pp 1013-1037. https://doi.org/10.1007/s11269-018-2162-7 |
| Drissia, T.K., Jothiprakash, V. & Anitha, A.B. (2019) Statistical classification of streamflow based on flow variability in west flowing rivers of Kerala, India, Theor Appl Climatol., 137, pp 1643-1658. https://doi.org/10.1007/s00704-018-2677-0 |
| Narasimha Prasad,N B (2016), Global Water Shortages, Mathrubhumi Knowledge & Beyond Year Book, Mathrubhubi Printing & Publishing Company Ltd, Kozhikode, pp.82-94. |
| Abdulla P K, Pravya Jayaraj C V, Priyalakshmi M T, Chandran K and James E J (2015), Changes to a Drive-in Beach in Southwest India due to Severe Erosion and Subsequent Reformation, Elsevier Aquatic Procedia, 4 (2015), DOI 10.1016/j.aqpro2015.02.048, pp 35 |
| Amritha Thankachan and Anitha A B (2015). Systems approach for optimal operation of water resources schemes in Kuttiyadi river basin, Kerala. International Journal of Elsevier, Aquatic Proceedia 4 (2015), pp 593-600 |
