KOTIRATHNAM, C N, et al. “Genetic, Phenotypic and Environmental Correlations Among Sow Productivity Traits in Desi Pigs and Their Crosses With Large White Yorkshire*”. The Indian Journal of Animal Sciences, vol. 71, no. 5, Jan. 2014, https://epubs.icar.org.in/index.php/IJAnS/article/view/36631.