Sergey Minov and Daniel L. Schwartz (eds.), "Council of Chalcedon (451)" in last modified March 11, 2022, http://syriaca.org/keyword/council-of-chalcedon-451
  
    
      
        Council of Chalcedon (451)
        
          
          
          
          
        
        http://syriaca.org/keyword/council-of-chalcedon-451