Shokat, S., F. M. Azhar, and M. B. Zia. “PATH COEFFICIENT ANALYSIS OF TOTAL SOLUBLE SOLIDS IN SOLANUM LYCOPERSICUM L”. The Nucleus, vol. 48, no. 4, Nov. 2011, pp. 339-42, http://thenucleuspak.org.pk/index.php/Nucleus/article/view/828.