In February 1998 the 8h International Symposium on Vulcanospeleology was hosted by CEGEA (Cave Exploration Group of East Africa) in Nairobi, Kenya: it was attended by 16 scientists coming from 4 continents. Pre- and Post- Symposium excursions allowed the participants to have an overview on the most important and famous volcanic cave of that area.
Halliday, William R..
Overview of the 8th International Symposium on Vulcanospeleology.
International Journal of Speleology,
Available at: http://scholarcommons.usf.edu/ijs/vol27/iss1/1