Xie, Y. Z., V. P. Kunets, Z. M. Wang, V. Dorogan, Y. I. Mazu, J. Wu, and G. J. Salamo. 2009. “Multiple Stacking of InGaAs/GaAs (731) Nanostructures”. Nano-Micro Letters 1 (1):1–3. https://doi.org/10.1007/BF03353596.