Sen’ko, I. O. “Consistency of an Adjusted Least-Squares Estimator in a Vector Linear Model With Measurement Errors”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 64, no. 11, Nov. 2012, pp. 1536-4, https://umj.imath.kiev.ua/index.php/umj/article/view/2679.