&lt;b&gt;The &amp;chi;&lt;sup&gt;2∆&lt;/sup&gt;&lt;em&gt;&lt;sub&gt;fA&lt;/sub&gt;&lt;/em&gt; defined by modulus&lt;/b&gt; - doi: 10.4025/actascitechnol.v35i3.16185
Acta Scientiarum. Technology/Acta scientiarum. Technology