أرسل هذا في رسالة قصيرة: Modelling dependency structures of crude oil prices and stock markets of developed and developing countries: A C-vine copula approach

   _____    ______   _    _      ___     ______   
  / ___//  /_   _// | || | ||   / _ \\  |      \\ 
  \___ \\   -| ||-  | || | ||  / //\ \\ |  --  // 
  /    //   _| ||_  | \\_/ || |  ___  |||  --  \\ 
 /____//   /_____//  \____//  |_||  |_|||______// 
`-----`    `-----`    `---`   `-`   `-` `------`