Pieter R. van Oel, Vincent O. Odongo, Dawit W. Mulatu, Jane Ndungu, Francis K. Muthoni, Job Ogada, George Khroda, Jude M. Mathooko, Robert Becht, Nzula Kitaka, Japheth O. Onyando, and Anne van der Veen.(2014)
Pieter Richard van Oel, Vincent Omondi Odongo, Dawit Woubishet Mulatu, Francis Kamau Muthoni, Jane Njeri Ndungu, Job Ochieng' Ogada & Anne van der Veen(2014)