Guillaumes, E. and Villar, J. (2004) “Effects of DMPP [3,4-dimethylpyrozole phosphate] on the growth and chemical composition of ryegrass (Lolium perenne L.) raised on calcareous soil”, Spanish Journal of Agricultural Research, 2(4), pp. 588-596. doi: 10.5424/sjar/2004024-115.