[MiKTeX] subsubsection number in bold

[Eric K. <st...@wa...>]

Hello!

The header of my document is
\documentclass[10pt,twoside,openany,a4paper,leqno]{amsbook}

I'm using numbered subsubsection (\subsubsection{title}) and the 
subsubsection number appears in plain types while I'd like to have it in 
bold types. Is there a way to have this?

Thanks,
Eric Kouris