• International Bankers Forum e.V., Frankfurt am Main; BVK e.V., Berlin

Interviews:

"No settlement agreement in the Mitec case", contribution to MDR programme on 29 September 2015

Publications:

Overview of Legal Framework Conditions for Investments by Institutional Investors in Renewable Energy Projects (p. 885 et seq., in "Finanzierung Erneuerbarer Energien", Frankfurt School Verlag, 2nd edition 2015);

M&A, Private Equity and Venture Capital in the Renewable Energy Sector (pp. 943 et seq., in "Finanzierung Erneuerbarer Energien", Frankfurt School Verlag, 1st edition 2011, co-author Christoph Schalast);

Financing Offshore Wind Farms (p. 685 et seq. in: "Finanzierung Erneuerbarer Energien", Frankfurt School Verlag, 1st edition 2011);

The Roche Decision of the U.S. Court of Appeals and its Lessons for the German Capital Market Law (Recht der Internationalen Wirtschaft, 2003);

The Cross-Border Rules of SEC and Their Importance for German Capital Market Law (Die Aktiengesellschaft, 2002);

Legal Protection of a Target Company in Case of Inadequate Takeover Bids (Die Aktiengesellschaft, 2002);

Preparation of a Merger by Way of a Capital Increase Against Contribution in Kind Through a "Business Combination Agreement" (Der Betriebsberater 2001);

Selected Structuring Options for Share Option Plans (Der Betriebsberater 1997);

Which Facts Have to Be Included in an Intercompany Agreement Report? (1996);

Prohibition of Acquisition of Own Shares Pursuant to Sec. 71 AktG (German Stock Corporation Act) and Own Participation Certificates Pursuant to Sec. 10 (5) Sent. 5 KWG (German Banking Act) (Die Aktiengesellschaft, 1992).

Lectures:

Dr Aha is a guest lecturer at Frankfurt School of Finance and Management.

Presentation "State-of-the-Art Structuring of Renewable Energy Overseas Investments and applicable Support Schemes" at the China Renewable Energy Overseas Investment Forum (Beijing, 3 December 2013);

Presentation "Legal Protection for Chinese PV Companies in Europe and Risk Management" at the Sino German Cooperation Workshop (SNEC 7th (2013) International Photovoltaic Power Generation Conference, Shanghai, 13-16 May 2013);

Presentation "Legal Basics of PV Projects in Germany without FIT Promotion" at the Intersolar Europe Conference 2013 (Munich, 18 June 2013);

Presentation "Private Equity/Venture Capital" at Frankfurt School of Finance & Management (Hamburg, 16 November 2013).