1. Kalnina, I., Rugele, K., Rubulis, J. Digestate Management Practices in Latvia from Nitrogen Perspective. Energy Procedia, 2018, Vol.147, 368.-373.lpp. ISSN 1876-6102. Pieejams: doi:10.1016/j.egypro.2018.07.105
2. Frolova, M., Tihomirova, K., Mežule, L., Rubulis, J., Gruškeviča, K., Juhna, T. Evaluation of Pre-Treatment Technologies for Phosphorous Removal from Drinking Water to Mitigate Membrane Biofouling. IOP Conference Series: Materials Science and Engineering, 2017, Vol.251, 1.-8.lpp. ISSN 1757-8981. e-ISSN 1757-899X. Pieejams: doi:10.1088/1757-899X/251/1/012127
3. Frolova, M., Zemītis, J., Tihomirova, K., Mežule, L., Rubulis, J., Gruškeviča, K., Juhna, T. Approbation of Microbially Available Phosphorus (MAP) Determination Method by Flow Cytometry. No: Environment. Technology. Resources: Proceedings of the 11th International Scientific and Practical Conference. Vol.1, Latvija, Rēzekne, 15.-17. jūnijs, 2017. Rēzekne: Rezekne Academy of Technologies, 2017, 89.-92.lpp. ISSN 1691-5402. Pieejams: doi:10.17770/etr2017vol1.2533
4. Nescerecka, A., Rubulis, J., Vital, M., Juhna, T., Hammes, F. 2014. Biological instability in a chlorinated drinking water distribution network . PLoS ONE, 9 (5), art. no. e96354.
5. Rugele, K., Bumanis, G., Bajare, D., Lakevics, V., Rubulis, J. 2014. Alkaline activated material for pH control in biotechnologies . Key Engineering Materials, 604, pp. 223-226.
6. Rugele, K., Mezule, L., Dalecka, B., Larsson, S., Vanags, J., Rubulis, J.(2013) Application of fluorescent in situ hybridisation for monitoring methanogenic archaea in acid whey anaerobic digestion
   Agronomy Research, 11 (2), pp. 373-380.
7. Rubulis, J., Dejus, S., Meksa, R. Online measurement usage for predicting water age from tracer tests to validate a hydraulic model (2012) Water Distribution Systems Analysis 2010, pp. 1488-1497.
8. Rubulis, J., Neilands, K. Interpretation of loose deposits motion in drinking water distribution network (2012) Water Distribution Systems Analysis 2010, pp. 643-654.
9. Tihomirova, K., Briedis, A., Rubulis, J., Juhna, T. Effect of biomass adaptation to biodegradation of dissolved organic carbon in water (2012) Biodegradation, 23 (2), pp. 319-324.
10. Tihomirova, K., A. Briedis, Rubulis J. and Juhna T. (2012) Effect of biostimulation on biodegradation of dissolved organic carbon in biological filters, Drink. Water Eng. Sci., 5, 23-29.
11. Neilands K., M. Bernats, and J. Rubulis (2012) Accumulation and modeling of particles in drinking water pipe fittings, Drink. Water Eng. Sci., 5, 47-57.
12. Tihomirova K, J. Rubulis and T.Juhna. (2010) Changes of NOM fractions during conventional drinking water treatment process in Riga, Latvia, J. Water Sci. Technol.: Wat. Supply, 10(2), 157-163.
13. Rubulis, J., Verberk, J., Vreeburg, J., Gruškevica, K., Juhna, T. 2008. Chemical and microbial composition of loose deposits in drinking water distribution systems. 7th International Conference on Environmental Engineering, ICEE 2008 – Conference Proceedings, pp. 695-702.
14. Rubulis, J., and T. Juhna 2007. Evaluating the Potential of Biofilm Control in Water Supply Systems by Removal of Phosphorus from Drinking Water. Water Science and Technology: Water Supply 55(8-9), 211-217.
15. Juhna, T., Birzniece, D., and J.Rubulis 2007. Effect of Phosphorus on Survival of Escherichia coli in Drinking Water Biofilms. Appl Environ Microbiol 73(11), 3755-3758.
16. Rubulis J., Lukjaņeca, I., Tihomirova, K., Juhna, T., Nazarovs, S., Kolyshkin, A., Vital, M., and F. Hammes 2007. Simulation of Bacterial Regrowth in Water Networks by Modelling of Pseudomonas fluorescens Growth in a lab Biofilm Reactor, p.229-236. In B.Ulanicki, K.Vairavamoorthy, D.Butler, P.L.M. Bound and F.A. Memon (ed), Water Management Challenges in Global Change. Taylor and Francis, UK.
17. Rubulis, J., and T. Juhna 2006. Effect of Phosphorus on Biofilm Growth in a Completely Mixed Biofilm Reactor, 2: p.73. In M.Wilson (ed), Biofilms II, Attachment and Detachment in Pure and Mixed Cultures. Cambridge University Press, UK.
18. Juhna, T., and J. Rubulis 2004. Problem of DOC removal during biological treatment of surface water with a high amount of humic substances. Water Science and Technology: Water Supply 4(4), 183–187.
19. Rubulis J., L. Šnīdere and V. Briedis (2001) Problems with drinking water metering in apartment buildings and flats in Riga city, Latvia. In: Water Software Systems. B.Coulbeck et.(ed.), Research Studies Press: Water Engineering and Management Series, 1, 349-356
20. Rubulis J., L. Šnīdere and V. Briedis (2001) Problems with drinking water metering in apartment buildings and flats in Riga city, Latvia. In: Water Software Systems. B.Coulbeck et.(ed.), Research Studies Press: Water Engineering and Management Series, 1, 349-356

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