History. 

 - Londres-ENK :   International Institute for Conservation,   1972. 
 - páginas 91-98 
 - Irregular 
 - Vol. 9, no. 2(1972) 
 - Art and archaeology technical abstracts   ;   Vol. 9, no. 2 .
<br/><br/> Paint and paintings. 
<br/><br/><br/>Inglés.