- Infrastructure-Based versus Service-Based Competition in Telecommunications: an Economic and Regulatory Review of National Implementation Strategies, in: Infrastructure Versus Service-Based Competition: The Case of Mobile Telecommunications (edited by Laurent Benzoni and Geoffron P.,), Quantifica Publishing, Paris 2008
- Kostenrechnung und Entgeltregulierung auf den österreischischen Telekommunikationsmärkten, Josef EUL-Verlag, Lohmar-Köln, 2006
- Central and Eastern European Countries way towards the Lisbon Targets - ICT as Driver for Economic and Social Development, in: Telecommunications Markets in Central and South Eastern Europe (edited by Kittl J., Lichtenberger E., Ruhle E-O., Schlipp C.), Bd. 6 der Reihe Regulierungsrecht und Regulierungsökonomie, Josef EUL Verlag, Köln 2006
- Infrastructure-Based Versus Service-Based Competition In Telecommunications, COMMUNICATIONS & STRATEGIES, no. 64, 4th quarter 2006, P. 67-87
- Regulation of Mobile Wholesale Markets in Europe and Austria, in: Die Regulierung der österreichischen TK-Märkte im neuen Rechtsrahmen (edited by Lichtenberger/Ruhle), Bd. 5 der Reihe Regulierungsrecht und Regulierungsökonomie, Josef EUL Verlag, Köln 2005
- Access, Call Origination and Voice Call Termination in Mobile Networks - A Comparison of Approaches and Consequences Brought About by the New Regulatory Framework, in: IDATE: Communications & Strategies, Nr 58/2. Quarter 2005, P. 117-139
- Lundborg, Martin; Reichl, Wolfgang; Ruhle, Ernst-Olav (2012), Spectrum Allocation and its Relevance for Competition, in: Telecommunications Policy, Vol. 36
- Ruhle/Lundborg (2010), EU policy for next generation access - an innovative or incremental step forward?, in: Telecommunications Policy, Vol. 34
- Pisjak/Felder/Ruhle/Lundborg/Ehrler (2009), Charging Regimes for Interconnection Services - Future Options and Potential Outcomes, in: Communications & Strategies, No. 73, p. 129-149
- Digital rights management (DRM) and the development of mobile content in Europe, in: Computer Law and Security, Volume 23/Number 6, p. 543-549
- Vergleichsmarktbetrachtungen als Entgeltregulierungsinstrument - Eine Analyse von Methodik und Konsistenz in den ersten Entgeltgenehmigungsverfahren, in: Computer und Recht (CR), 1/2006, P. 21-27
- Der neue Regulierungsansatz bei den Mobilfunkterminierungsentgelten - Eine kritische Analyse des Vorschlags der Regulierungsbehörde vom 09.03.2005, in: medien und recht 4/05, P. 285-291
- Entgeltregulierung im Energiesektor mittels Yardstick-Competition, in: Zeitschrift für Energiewirtschaft, Nr. 2/2005, P. 115-123
- Community owned fibre optical networks - a sustainable broadband future for rural areas in Croatia?, European Regional ICT Conference, Copenhagen, 2010
- Lessons Learned from the Regulation of LLU for the Future Regulation of NGA Networks, presented at the ITS Regional Conference in Rome 18-20 September 2008
- The Impact of Spectrum Refarming and the EU-Wide Spectrum Directive for Mobile TV on the Spectrum Markets, presented at the CICT Conference (Lyngby-Copenhagen), 29-30 November 2007
- The impact of future frequency regulation on business models for Mobile TV, presented at the CICT Conference in Lyngby, Copenhagen 30. November until 1. December 2006
- The likely development of competition under the new regulatory framework, presented at the ITS-Europe Regional Conference in Amsterdam 22-24 August 2006
- Which impact did the privatisation of telecommunication incumbents in the EU have on competition, presented at the ITS biennial conference in Beijing, China, June 12-16 2006
- Different liberalization strategies and their impact on the development and success of competition, presented at the ECPR-2006 Conference in Sevilla, March 2006
- VoIP ist nicht immer gleich VoIP, in: Teletalk 1/2006, P. 22