Clemens, A.H., Gong, D., Pearce, S.M., & Matheson, T.W. (October 2002). New combustion, gasification and hydrogen-based energy technologies for the 21st Century. In: Proceedings of the New Zealand Energy Conference. Wellington.

Clemens, A.H., Gong, D., & Pearce, S.M. (September 2003). Hydrogen from New Zealand Coal. Article 40-4. In: Proceedings from the 20th International Pittsburgh Conference. Link to abstract.

Thomas, L.E. (June 2003). New Zealand’s Fuel Cell Future. Special Issue. Energywise News. Issue 82. Wellington: Energy Efficiency and Conservation Authority (EECA).

Thomas, L.E. (2003). Hydrogen, Fuel Cells, Energy. Alpha 118. Wellington: Royal Society of New Zealand.

Clemens, A.H. & Matheson, T.W. (February 2004). A New Coal Technology Package for the Hydrogen Energy Economy. Information booklet for the Official Hydrogen Gasifier Launch, CRL Energy Limited.

Boniface, M., Clemens, A.H., & Pearce, S.M. (September 2004). Study on the suitability of New Zealand coals for hydrogen production. In: Proceedings of the 21st International Pittsburgh Coal Conference, Osaka, Japan.

Brown, R., Clemens, A.H., & Pearce, S.M. (25 November 2004). Hydrogen – the new energy carrier. Presentation at: Future Energy Technologies Symposium, Wellington.

Clemens, A.H. (October 2004). Generation of hydrogen from coal in New Zealand. Presentation at: 13th  International  Conference  on  Coal  Research. Shanghai, China.

Pearce, S.M., Clemens, A.H., & Brown, R. (25 August 2004). Hydrogen – a long term future for the coal industry. Presentation to: Coal Association of New Zealand. Wellington: CRL Energy

Whitney, R.S. (18 November 2004). Hydrogen—a long-term future for the coal industry. In: People and Energy: How Do We Use It?. Proceedings of People and Energy conference. Christchurch: Royal Society of New Zealand.

Brown, R.K. (2005, October). Importance of gasification to New Zealand’s energy future. In: Proceedings from the New Zealand Gas Engineers Industry Conference 2005. Wellington: New Zealand Gas Engineers Industry Conference.

Clemens, A.H. (March 2005). Hydrogen and fuel cell RD & D activities in New Zealand. Presentation to: Latin American Forum and IPHE ILC Meeting. Rio de Janeiro.

Clemens, A.H. (March 2005). The role of lignites in a hydrogen energy future for New Zealand. Presentation to: Southland Ventures Forum Lignites Symposium, Invercargill.

Clemens A.H. (2005, October 12). A hydrogen energy economy for New Zealand. Presentation to: The Energy Federation of New Zealand Future Technologies Symposium 2005. Wellington: CRL Energy Ltd.

Clemens, A.H., Brown, R.K., & Pearce S.M. (2005, September). Commissioning of a coal to fuel cell grade hydrogen technology package. In: Proceedings from The Pittsburgh International Coal Conference 2005. Pittsburgh, USA: Pittsburgh International Coal Conference.

Clemens, A.H., Brown, R.K., & Pearce S.M. (2005, September). Commissioning of a coal to fuel cell grade hydrogen technology package. Presentation to: The Pittsburgh International Coal Conference 2005. Pittsburgh, USA: CRL Energy.

Thomas, L.E. (2005, July/August). Fuel of the future. In e.nz. 36-40. Wellington: IPENZ.

Whitney R. & Clemens A. (2005, September 29-30). Priority research requirements for a hydrogen economy. Presentation to: Energy Research Investment Strategy Workshop. Wellington: CRL Energy Ltd.

Clemens, A.H. (2006). Towards a fuel cell future? In: National Gas Review. Autumn 2006. Wellington: Gas Association of New Zealand.

Clemens, A., Gong, D., & Pearce, S. (2006). Study on the suitability of New Zealand coals for hydrogen production. In: International Journal of Coal Geology. vol. 65, no 3-4 (18 ref.), pp. 235-242 [8 page(s) (article)], Link to Abstract.