E. L. LeRiche, Wang-Pruski, G., and Zheljazkov, V. D.,
“Mineral concentration and distribution in tubers of fertilized and unfertilized potato cultivars Shepody and Russet Burbank as determined by VP-SEM/EDS”,
Canadian Journal of Plant Science, vol. 86, no. Special Issue, pp. 1349 - 1353, 2006.