“Changes in Bacillus thuringiensis Tolerance Levels Due to Hybridization of Bt-Tolerant and Susceptible Silkworm Populations: Bacillus thuringiensis Tolerant Silkworm Hybrids”, Pakistan Journal of Scientific & Industrial Research, vol. 55, no. 2, pp. 101–107, Aug. 2012, doi: 10.52763/PJSIR.BIOL.SCI.55.2.2012.101.107.