@ARTICLE {SANGINGA:1990b,
title = {Influence of reference trees on N2-fixation estimates in Leucaena leucocephala and Acacia albicia using 15N_ labelling techniques},
author = {Sanginga, N. and Danso, S. K. A. * and Zapata, F. and Bowen, G. D. },
journal = {Biology and Fertility of Soils},
year = {1990},
volume = {9},
pages = {341--346},
}