Soaud, A. A., K. A. El-Tarabily, and S. Matsumo,
"Effect of Paracoccus Versutus, elemental sulfur, and compost on the pH and available sulfur content of calcareous sandy soils.",
The 20th World Congress of Soil Science (20WCSS), Jeju, Korea, 8 -13 June, 2014.