deletions | additions       diff --git a/Clumping in O Stars.tex b/Clumping in O Stars.tex  index 5c6ea91..9e2e147 100644  --- a/Clumping in O Stars.tex  +++ b/Clumping in O Stars.tex 
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In any case, strong winds - identified as such if H$\alpha$ is seen in   emission - are clumped near the base of the wind.   A measure of the degree of clumping is the clumping factor $f_{\rm cl} =$  values \citep{2006A&A...454..625P}. \citep{2006AA...454..625P}.