Amiri, K., N. Shabanipour, and S. Eagderi. “Using Kriging and Co-Kriging to Predict Distributional Areas of Kilka Species (Clupeonella spp.) in the Southern Caspian Sea”. International Journal of Aquatic Biology, vol. 5, no. 2, June 2017, pp. 108-13, doi:10.22034/ijab.v5i2.309.