Holmes, D A <br/><br/>
On-axis irradiance of a focused, apertured gaussian beam.  [electronic resource] 

 -  Applied optics  Sep 1970 
 - 2179-80 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1559-128X 
<br/><br/><label>Standard No.: </label>10.1364/AO.9.002179  doi