| # | 
        Database  | 
      
      
      
        | 01 | 
         | 
      
      
      
        | 02 | 
         | 
      
      
      
        | 03 | 
        - American Chemical Society
 
  | 
      
      
       
        | 04 | 
        - American Institute of Physics (AIP)
 
  | 
      
       
        | 05 | 
        - American Mathematical Society (AMS)
 
  | 
      
       
        | 06 | 
        - American Physical Society (APS)
 
  | 
      
       
        | 07 | 
         | 
      
       
        | 08 | 
        - American Society of Civil Engineers (ASCE)
 
  | 
      
       
        | 09 | 
         | 
      
       
        | 10 | 
        - Cambridge University Press (CUP)
 
  | 
      
       
        | 11 | 
         | 
      
       
        | 12 | 
         | 
      
       
        | 13 | 
         | 
      
       
        | 14 | 
         | 
      
       
        | 15 | 
         | 
      
       
        | 16 | 
        - Institute of Physics (IoP)
 
  | 
      
       
        | 17 | 
        - Lippincott Williams & Wilkins (Wolters Kluwer) Journals
 
  | 
      
       
        | 18 | 
        - Oxford University Press (OUP)
 
  | 
      
       
        | 19 | 
         | 
      
       
        | 20 | 
         | 
      
       
        | 21 | 
         | 
      
       
        | 22 | 
         | 
      
       
        | 23 | 
         | 
      
       
        | 24 | 
         | 
      
 
     
        | 25 | 
         |