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