A. Azzeddin M. and F. S. El-Musmary, “The Role of Extracellular Polysaccarides Excreted By Different Isolates Of Xanthomonas campestris pv. Vesicatoria On Occurance Of Some Disease Symptoms”, MJSc, vol. 8, no. 1, pp. 69–55, Dec. 2001.