Text this: Spreading resistance calculations by the variational method

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