Kozlova, T N <br/><br/>
Changes in the heart rate during mental work of increasing intensity.  [electronic resource] 

 -  Human physiology   
 - 401-3 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0362-1197 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adolescent<br/>Adult<br/>Heart Rate<br/>Humans<br/>Problem Solving