de Bruijn, F. J., Felix, G., Grunenberg, B.
, Hoffmann, H. J., Metz, B., Ratet, P., Simons-Schreier, A., Szabados, L., Welters, P. & Schell, J. (1989).
Regulation of plant genes specifically induced in nitrogen-fixing nodules: role of cis-acting elements and trans-acting factors in leghemoglobin gene expression.
Plant Molecular Biology,
13(3), 319-25.