Lan, N. Q., N. T. Giang, G. J. Mathews, and L. Saleh. “Constraints on Early Star Formation and Mixing from Nucleosynthesis in Protogalactic Clouds”. Communications in Physics, vol. 20, no. 1, Aug. 2012, p. 23, doi:10.15625/0868-3166/20/1/1986.