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   _____     ___     __   __   _    _     ____    
  / ___//   / _ \\   \ \\/ // | || | ||  |  _ \\  
  \___ \\  / //\ \\   \   //  | || | ||  | |_| || 
  /    // |  ___  ||  / . \\  | \\_/ ||  | .  //  
 /____//  |_||  |_|| /_//\_\\  \____//   |_|\_\\  
`-----`   `-`   `-`  `-`  --`   `---`    `-` --`

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Text this: Thickness-mode nonlinear vibration of quartz crystal with initial stress and cut-identification for optimal frequency sensitivity