NANO LETTERS, vol. 8, no. 2, page. 431 - 436, 2008-02
Nano Letters, vol. 12, no. 2, page. 855 - 860, 2012-02
JOURNAL OF APPLIED PHYSICS, vol. 105, no. 12, 2009-06-15
Journal of Crystal Growth, vol. 345, no. 1, page. 56 - 60, 2012-04-15