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             ___      _____      ___      _____   
  ____      / _ \\   /  ___||   / _ \\   /  ___|| 
 |    \\   / //\ \\ | // __    | / \ || | // __   
 | [] ||  |  ___  ||| \\_\ ||  | \_/ || | \\_\ || 
 |  __//  |_||  |_|| \____//    \___//   \____//  
 |_|`-`   `-`   `-`   `---`     `---`     `---`   
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Text this: Edge elastic properties of defect-free single-layer graphene sheets