Text this: Model identification for closed-loop multivariable processes based on min-max critical frequency search

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