- Retscher G., J. Gabela, V. Gikas (2022): PBeL—A Novel Problem-Based (e-)Learning for Geomatics Students. Geomatics 2022, 2, 76–106. DOI: https://doi.org/10.3390/geomatics2010006
- Retscher G., V. Gikas, R. Gerike (2021): Curricula Enrichment for Sri Lankan Universities Delivered Through the Application of Location-based Services to Intelligent Transport Systems. in: Papers presented at the FIG e-Working Week 2021, June 20-24, 2021, 16 pgs. (paper 10865). Link
- Ranasinghe P., T. Dammalage, G. Retscher (2019): A Low-cost Public Transport Tracking and Information System for Commuters in Sri Lanka. in: Gartner G., H. Huang (eds.): Adjunct Proceedings of the 15th International Conference on Location-Based Services (LBS 2019), November 11-13, 2019, Vienna, Austria, pp. 207-211. DOI: https://doi.org/10.34726/lbs2019.25
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