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EXHIBIT A

The undersigned, Itshak Sharon (Tshuva), Delek Group, Ltd., Delek Petroleum, Ltd. and Delek Hungary Holding Limited Liability Company, hereby agree that the Schedule 13G to which this Exhibit is appended is filed on behalf of each of the undersigned.


 
/s/ Itshak Sharon (Tshuva)
 
Itshak Sharon (Tshuva)
   
 
Delek Group, Ltd.
   
 
/s/ Gabriel Last
 
By: Gabriel Last
 
Title:  Chairman
   
 
/s/ Asaf Bartfeld
 
By: Asaf Bartfeld
 
Title:   Chief Executive Officer
   
 
Delek Petroleum, Ltd.
   
 
/s/ Gabriel Last
 
By: Gabriel Last
 
Title:  Chairman
   
 
/s/ Asaf Bartfeld
 
By: Asaf Bartfeld
 
Title:   Director
   
 
Delek Hungary Holding Limited Liability Company
   
 
/s/ Barak Mashraki
 
By: Barak Mashraki
 
Title:  Managing Director
 
Date:  February 14, 2013