2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/180382In this talk I first present a short review of fluctuations in $e^+e^-$-annihilations. I then describe some new results on FD correlations. Experimental analyses of $pp$ and $ΛΛ$ correlations indicate a very small production radius. This result relies very strongly on comparisons with MC simulations. A study of the approximations and uncertainties is these simulations imply that it is premature to draw such a conclusion from the data.Talk presented at XXXVI Int. Symp. on Multiparticle Dynamics, Paraty, Brazil, 2 - 8 Sept. 2006High Energy Physics - Phenomenologytext