| Shear behaviour of physical models of rock joints under constant normal stiffness conditions Y Ohnishi, PGR Dharmaratne International symposium on rock joints, 267-273, 1990 | 80 | 1990 |
| A comparison of global rare earth element (REE) resources and their mineralogy with REE prospects in Sri Lanka NM Batapola, NP Dushyantha, HMR Premasiri, A Abeysinghe, ... Journal of Asian Earth Sciences 200, 104475, 2020 | 51 | 2020 |
| Constraints to rare earth elements supply diversification: Evidence from an industry survey I Ilankoon, NP Dushyantha, N Mancheri, PM Edirisinghe, SJ Neethling, ... Journal of Cleaner Production 331, 129932, 2022 | 49 | 2022 |
| Simplified rock mass rating system for mine tunnel support N Brook, GR Dharmaratne Transactions-Institution of Mining and Metallurgy. Section A. Mining …, 1985 | 30 | 1985 |
| Sapphires From Thammannawa, Kataragama Area, Sri Lanka. PGR Dharmaratne, HM Premasiri, D Dillimuni Gems & Gemology 48 (2), 2012 | 10 | 2012 |
| A Framework to analyze the effectiveness of collaborative e-Learning (CeL) in Sri Lankan University Education I Kanaganayagam, S Fernando SRI LANKA 8, 2013 | 7 | 2013 |
| Leaching of Rare Earth Elements (REEs) from lake sediments around Eppawala phosphate deposit, Sri Lanka: A secondary source for REEs NP Dushyantha, NP Ratnayake, HMR Premasiri, I Ilankoon, PVA Hemalal, ... Hydrometallurgy 205, 105751, 2021 | 6 | 2021 |
| Characterization of heat treated geuda gemstones for different furnace conditions using FTIR, XRD and UV–visible spectroscopy methods RGC Jaliya, PGR Dharmaratne, KB Wijesekara Solid Earth Sciences 5 (4), 282-289, 2020 | 6 | 2020 |
| Sensitivity of rice to Ludwigia decurrens (L.) PG Dharmaratne, SL Ranamukaarachchi Postgraduate Institute of Agriculture, University of Peradeniya: Peradeniya, 1991 | 6 | 1991 |
| 岩石ジョイントモデルの連続載荷式の新しいせん断試験方法について 大西有三 第 25 回土質工学研究発表会講演概要集, 1089-1092, 1990 | 5 | 1990 |
| Recovery Potential of Rare Earth Elements (REEs) from the Gem Mining Waste of Sri Lanka: A Case Study for Mine Waste Management N Dushyantha, IMSK Ilankoon, NP Ratnayake, HMR Premasiri, ... Minerals 12 (11), 1411, 2022 | 3 | 2022 |
| Optimizing the specific charge for limestone blasting at Aruwakkalu Limestone Quarry WDS Perera, NBM Epa, DA Neligama, PVA Hemalal, PGR Dharmaratne | 3 | 2017 |
| Optimization of Sri Lankan underground graphite mining methods, from a view point of rock mechanics and cost MC Hettiwatte | 3 | 2015 |
| Evaluation of Overhand Cut and Fill Mining Method used in Bogala Graphite Mines, Sri Lanka PGR Dharmaratne, PVA Hemalal, MC Hettiwatte National Engineering Conference 2013, 19th ERU Symposium, 2013 | 3 | 2013 |
| Sapphires from Thammannawa, Kataragama area, Sri Lanka. G&G, Vol. 48, No. 2 PGR Dharmaratne, HM Ranjith Premasiri, D Dillimuni | 3 | 2012 |
| Gem Industry of Sri Lanka PGR Dharmaratne Geological Survey and Mines Bureau of Sri Lanka, 2005 | 3 | 2005 |
| Corundum/spinel reaction textures in carbonate-origin rocks M Francis, PGR Dharmaratne Sri Lanka: Preliminary observations, The Australian Gemmologist 21, 211, 2002 | 3 | 2002 |
| Study on royalty for Sri Lankan quarry mining of industrial minerals using photogrammetric 3D modelling K Jayawardana, DRM Athukorala, HMD Chathuranga, M Chrishoban, ... Department of Earth Resources Engineering, 2019 | 2 | 2019 |
| Optimizing the specific charge for limestone blasting at Aruwakkalu limestone quarry H Mendis, KR Wimalagunasekara, MLS Jinadasa, PVA Hemalal, ... Department of Earth Resources Engineering, 2018 | 2 | 2018 |
| Use of dynamites, water-gels and emulsion explosives in Sri Lankan quarrying/mining practice PVA Hemalal, PGR Dharmarathne, PI Kumarage Engineer: Journal of the Institution of Engineers, Sri Lanka 48 (1), 2015 | 2 | 2015 |
