Lewin, Joyce <br/><br/>
Surf-zone diatoms of the coasts of Washington and New Zealand (Chaetoceros armatum T. West and Asterionella spp.) 

 - pp. 143-149 
<br/><br/> Lewin, Joyce y Norris, Richard E. (1970).  "Surf-zone diatoms of the coasts of Washington and New Zealand (Chaetoceros armatum T. West and Asterionella spp.)". Phycologia, Vol. 9, no. 2.