Lettmayer, G., Kaltenegger, I., 2003: How to develop a simple self evaluation methodology for research projects and teams. Proceedings of ECO-EASY (Evaluation of sustainable development) Conference Vienna, May 2003. http://www.sustainability.at/easy/easy_eco2/proceedings/pdf/b2_kaltenegg...
Lettmayer, G., 2002: Networking for sustainability in Andean Regions. Proceedings of the European Roundtable on Cleaner production (ERCP) Cork, October 2002.
Lettmayer, G., Hammerl, B., 2001: How research and region could co-operate in a sustainable way - a methodical approach. Case study: Innovative use of renewable resources in Eastern Styria, Austria. Proceedings of the European Roundtable on Cleaner production (ERCP) Lund, May 2001.
Hammerl, B., Lettmayer, G., 2001: Networks as organisational opportunity for the dissemination of cleaner production approaches in Small enterprises. Proceedings of the European Roundtable on Cleaner production (ERCP) Lund, May 2001.
Lettmayer, G., 2000: Learning to respect: Co-operation with resource users. In: Lawrence, A.(ed.): Forestry, Forest users and research: New ways of learning. ETFRN, Wageningen.
Lettmayer, G., 2000: Learning development from other continents: Participatory methods, their background and ways of intercultural knowledge exchange. Proceedings of 3rd international conference of the European Society for Ecological Economics (ESEE), 3 6 Mai 2000, Vienna.
Lettmayer, G., Gender und Entwicklung. Teil A: Burkina Faso.EWA - Strategiepapiere/Documents stratégiques dEWA. Salzburg 1997.
Lettmayer,G., Le feu fertilisant? Quelques aspects des feux de brousse dans les Hautes Terres Malgaches. In: Cahiers Terre Tany 1994. Hsg.Gruppe für Entwicklung und Umwelt, Geographisches Institut der Universität Bern. Bern 1994.
Lettmayer,G., Eine angepaßte Methodik zur Bodenkartierung an der Falaise Est (Madagascar). In: Cahiers Terre Tany 1994. Hsg.Gruppe für Entwicklung und Umwelt, Geographisches Institut der Universität Bern. Bern 1994.
Lettmayer,G., Bodenerosion in der Kulturlandschaft von Ayopaya (Cochabamba), Bolivien. Quantitative und qualitative Untersuchungen. Diplomarbeit Post Graduate Universität Göttingen. Göttingen 1993.
Lettmayer,G., Bodenerosion in der Oststeiermark am Beispiel des Poppendorfer Tales. Dissertation Universität Graz. Graz 1988.
