Bregantini D. Moment-based estimation of stochastic volatility. J Bank Financ. 2013 Dec 1;37(12):4755-64. doi: 10.1016/j.jbankfin.2013.08.008
Merrill RM, Kelley TA, Cox E, Layman AB, Layton BJ, Lindsay R. Factors and barriers influencing influenza vaccination among students at Brigham Young University. Med Sci Monit. 2010 Feb;16(2):PH29-34.