1. www.score.uk.com.
2. www.undp.org.
3. Biomass cook stoves: impact on global warming and women and children's health;Krishnan,2009
4. Designing a low cost electricity-generating cooking stove;Riley;IEEE Technology and Society Magazine,2010
5. Practical Action Field Trial #1 in Nepal and Kenya reports, http://www.score.uk.com/research/default.aspx.