Stehr, Mads, and Markus Kiderlen. “Improving the Cavalieri Estimator under Non-Equidistant Sampling and Dropouts”. Image Analysis and Stereology 39, no. 3 (November 25, 2020): 197–212. Accessed April 30, 2025. http://233.ablak.arnes.si/ojs/index.php/IAS/article/view/2422.