Markowski, Carol A; Markowski, Edward P. (1990). «Conditions for the Effectiveness of a Preliminary Test of Variance». The American Statistician. 44 (4): 322–326. JSTOR2684360. doi:10.2307/2684360
Markowski, Carol A; Markowski, Edward P. (1990). «Conditions for the Effectiveness of a Preliminary Test of Variance». The American Statistician. 44 (4): 322–326. JSTOR2684360. doi:10.2307/2684360