1992

1. Effects of the Use of H2SO4 in producing humic materials from kraft black liquors

   Bioresource Technology, Vol. 40, Núm. 1, pp. 81-83

2. Nitrogenous humic fertilizers by ammoniation of humic material obtained from kraft black liquors

   Water, Air, & Soil Pollution, Vol. 61, Núm. 1-2, pp. 191-199

3. Use of kraft black liquors from a pulp mill for the production of soil conditioners

   Waste Management & Research, Vol. 10, Núm. 2, pp. 195-201

4. Waste kraft black liquors as raw material for the production of nitrogeneous humic fertilizers by an oxidation-ammoniation process

   Fertilizer Research, Vol. 33, Núm. 3, pp. 279-285