1. K. Stange 26
2. K. Stange
3. D. R. Mitchell: \documentclass{article}\pagestyle{empty}\begin{document}$$ r = 0,6745\sqrt {\frac{{pW'}}{W}} $$\end{document} r r p W W γ
4. J. A. Dukes 32 \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm E}{\rm .A}{\rm .S}{\rm . = }\frac{{Pg}}{{\overline x - \overline x ^2 }}\frac{{S(x - \overline x)^2 }}{{n - 1}} $$\end{document} p g n x x S