@ARTICLE {VERSTEEG:1993,
title = {Participative farmer testing of four low external input technologies, to address soil fertility decline in Mono Province( Benin)},
author = {Versteeg, M. and Koudokpon *, V. },
journal = {Agricultural Systems},
year = {1993},
volume = {42},
number = {2},
pages = {265--276},
issn = {0308-521X},
}