// PUBLIKATIONEN (Auswahl)
- Gungl J., Gratzer A., Ruhle E.O., Freund N.: Electronic Communications Services in the World of Apps – Regulatory Challenges in Barringer J.P.: Telecommunications - Applications, Modern Technologies and Economic Impact: Nova Science Publishers, New York, 2014
- Gratzer A.: Why did the MTR drop down so far? - Observations regarding the regulation of Mobile Termination Rates in Austria: Akademische Verlagsgemeinschaft, München, 2010
- Gratzer A.: The regulation of mobile termination rates in Austria - A critical analysis, Dissertation submitted for the degree of "Master of Arts in Economics" at King's College London, 2009
- Gratzer A.: Die Deregulierung des österreichischen Telekommunikationsmarktes und deren wirtschaftliche Auswirkungen, Diplomarbeit am Institut für Unternehmensführung der FH-Wien, 2000
// KONGRESSBEITRÄGE (Auswahl)
- Gratzer A.: Why do you want to work with MVNOs?, Panel Discussion at the NVNO Nation Congress 2023, Valencia, Spain, October 2023
- Gratzer A.: How to create win-win MNO and MVNO partnerships with 5G access, Panel Discussion at the MVNOs World Congress 2022, Berlin, Germany, Juli 2022
- Gratzer A.: What are the new business models in the market?, Panel Discussion at the MVNOs World Congress 2018, Madrid, Spain, April 2018
- Gratzer A.: With 5G comes greater opportunities, Panel Discussion at the MVNOs Europe Congress 2017, London, United Kingdom, November 2017
- Gratzer A.: Trends on the European Wholesale market. The new roaming regulation., presented at the International MVNO/VAS Summit, Beijing, China, July 2017
- Gratzer A., Buschina S.: Zero-rated and co-sponsored mobile business models in a quite regulated environment, presented at the MVNOs World Congress, Nice, France, April 2017
- Gratzer A.: Recent developments in the Austrian MVNO market, presented at the MVNOs World Congress, Amsterdam, Netherlands, April 2016
- Gratzer A.: The Implications of Regulated Lower Mobile Termination Rates across Europe, presented at the IIR Interconnection World Forum, London, UK, January 2012
- Gratzer A.: Pitfalls in calculating fair mobile termination rates, presented at the IQPC Interconnection & Termination Rates Conference, Vienna, Austria, September 2011
- Gratzer A., Oppel A.: Mobile Number Portability in Austria - Opportunities and Pitfalls, presented at the IIR's Number Portability 2010 Conference, Vienna, Austria, September 2010
- Gratzer A.: How to Allocate Network Costs to Voice and Data Products - Lessons Learnt in Austria, presented at the marcusevans's 3rd Annual IP and Telecoms Interconnection Strategies Conference, Berlin, Germany, September 2009
- Ruhle E.O., Gratzer A.: The impact of data services on the calculation of network costs in mobile networks - Paper prepared for the 4th ITS Africa-Asia-Australasia Regional Conference, Curtin Business School, Perth, Australia, August 2009
- Gratzer A.: Calculating and optimising the investment required for integrating MVNOs with your existing network infrastructure, presented at the IIR's MVNO Congress 2006, Cannes, France, November, 2006
- Gratzer A.: Interconnection in Next Generation Networks, presented at the Informa's Interconnection & Wholesale Conference, Barcelona, Spain, 2006
- Gratzer A.: Interconnection needs of mobile operators in the CEE region, presented at the Capacity CEE 2006 Conference, Prague, Czech Republic, 2006
- Jones D., Gratzer A.: Pricing Strategies for GPRS in the International Marketplace, presented at the Informa's Pricing and Bundling for Mobile Services Conference, London, UK, 2003
- Gratzer A.: Mobile Interconnection in Austria - The new Approach, presented at the Vision in Business's Global Interconnection Forum 2002, Cannes, France, 2002
- Gratzer A.: Interconnection billing in a packet switched mobile network, presented at the Vision in Business's Global Interconnection Forum 2000, Brussels, Belgium, 2000
- Sprinzl M., Gratzer A.: Mobile to Mobile Interconnection - The Austrian perspective, presented at the SMi's Interconnect 2000 Conference, London, UK, 2000
- Gratzer A., Erdtner B.: Developments in interconnect billing, presented at the SMi's Austria Telecoms Conference, Vienna, Austria, 1999
- Gratzer A.: The Austrian mobile interconnection market, presented at the IBC's Interconnection 99 Conference, Amsterdam, Netherlands, 1999
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