Hoggren, Mats. <br/><br/>
Mating strategies and sperm competition in the Adder (Vipera berus) 
Mats. Hoggren 
 - Uppsala :  Acta Universitatis Upsaliensis,  1995. 
 - 27p. :  ill. ;  25cm. 
<br/><br/>Includes bibliographical references<br/> 
<br/><br/><label>ISBN: </label>91-554-3630-7 
<br/><br/><label>LC Class. No.: </label>PAM QA76.76.H63 No.163