Lilligreen, G., Wiebel, A. Near and Far Interaction for Outdoor Augmented Reality Tree Visualization and Recommendations on Designing Augmented Reality for Use in Nature. SN COMPUT. SCI. 4, 248 (2023). DOI: 10.1007/s42979-023-01675-7

Lilligreen, G., Henkel, N. , and Wiebel, A. (2022). Near and Far Interaction for Augmented Reality Tree Visualization Outdoors. In Proceedings of the 17th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications – HUCAPP, ISBN 978-989-758-555-5, pages 27-35. DOI: 10.5220/0010785700003124 (Best Paper Award)

Gergana Lilligreen, Philipp Marsenger, Alexander Wiebel: Rendering Tree Roots Outdoors: A Comparison Between Optical See Through Glasses and Smartphone Modules for Underground Augmented Reality Visualization. In Virtual, Augmented and Mixed Reality, 13th International Conference, VAMR 2021, Held as Part of the 23rd HCI International Conference, HCII 2021, Virtual Event, July 24–29, 2021, Proceedings DOI:10.1007/978-3-030-77599-5_26

Jason Rambach, Gergana Lilligreen, Alexander Schäfer, Ramya Bankanal, Alexander Wiebel, Didier Stricker: A survey on applications of augmented, mixed and virtual reality for nature and environment. In Virtual, Augmented and Mixed Reality, 13th International Conference, VAMR 2021, Held as Part of the 23rd HCI International Conference, HCII 2021, Virtual Event, July 24–29, 2021, Proceedings DOI:10.1007/978-3-030-77599-5_45

Gergana Lilligreen, Alexander Wiebel: Augmented Reality in Vorlesung und Übung: Lehre und Interaktion neu gedacht. In Thomas Barton, Christian Müller, Christian Seel (Hrsg.), Hochschulen in Zeiten der Digitalisierung: Lehre, Forschung und Organisation, pages 221-238. Springer Vieweg, 2019. DOI: 10.1007/978-3-658-26618-9_14

Gergana Lilligreen, Sascha Keuchel, Alexander Wiebel: Augmented Reality in Higher Education: An Active Learning Approach for a Course in Audiovisual Production. In 16th EuroVR International Conference – EuroVR 2019, Application Track, pages 23-36, 2019.

Gergana Lilligreen, geb. Itsova: Interkulturelle Kompetenz und virtuelle Welten. May 2010, Publisher: VDM Verlag Dr. Müller

Harbusch, K.; Lilligreen, geb. Itsova, G.; Koch, U.; Kühner, C.: Computing Accurate Grammatical Feedback in a Virtual Writing Conference for German-Speaking Elementary-School Children: An Approach Based on Natural Language Generation. In CALICO Journal. 2009. DOI:10.1558/cj.v26i3.626-643

Harbusch, K.; Lilligreen, geb. Itsova, G.; Koch, U.; Kühner, C.: The Sentence Fairy: a natural-language generation system to support children’s essay writing. In Computer Assisted Language Learning, 21:4, 339-352, 2008 DOI: 10.1080/09588220802343496

Harbusch, K.; Koch, U.; Kühner, C.; Lilligreen, geb. Itsova, G.; van Breugel, C.: “The Sentence Fairy”: NLP techniques in support of essay writing by German-speaking elementary schoolers. Waterloo, Canada, 2007