1) L. V. Dung, Mean convergence theorems for double arrays of random elements in Banach spaces, Journal of Science-Vinh University, 2007 (4A), 15-24.
2) L. V. Dung, Th. Ngamkham, N. D. Tien and A. I. Volodin, Marcinkiewwcz-type law of large numbers for double arrays of random elements in Banach spaces, Lobachevskii Journal of Mathematics, 2009, Vol. 30 (4), 337-346.
3) Le Van Dung, Weak laws of large numbers for double arrays of random elements in Banach spaces, Acta Mathematica Vietnamica, 2010, 387-398.
4) L. V. Dung and N. D. Tien, Mean convergence theorems and weak laws of large numbers for double arrays of random elements in Banach spaces, Bull.Math. Korean, 2010 (47), 467 - 482.
5) L. V. Dung and N. D. Tien, Mean Convergence Theorems and Weak Law of Large Numbers with or without Random Indices for Double Arrays of Random Elements in Banach Spaces, Journal of Probability and Statistical Science, 2009. Accepted.
6) L. V. Dung and N. D. Tien, Strong laws of large numbers for random fields in martingale type p Banach spaces, Statistics and Probability letters, 2010, Vol. 80 (9-10), 756-763.