Pamerneckis, Stasys. 1998. “Correlation Regression Analysis of Serf Estates of Lithuania in Šiauliai Economy from the End of the 18th Cent. To the 1st Thirty of the 19th Century”. Lietuvos Istorijos Studijos 6 (December): 28-56. https://doi.org/10.15388/LIS.1998.37280.