<?xml version="1.0"?>
<dblp>
<article key="journals/tcs/Bradfield98" mdate="2003-11-19">
<author>Julian C. Bradfield</author>
<title>The Modal &#181;-Calculus Alternation Hierarchy is Strict.</title>
<pages>133-153</pages>
<year>1998</year>
<volume>195</volume>
<journal>Theor. Comput. Sci.</journal>
<number>2</number>
<url>db/journals/tcs/tcs195.html#Bradfield98</url>
<ee>http://dx.doi.org/10.1016/S0304-3975(97)00217-X</ee>
</article>
</dblp>
