Text this

Number:

Provider:

CAPTCHA:

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

Please enter what you see:

Text this: Effect of hole doping on the London penetration depth in Bi2.15 Sr1.85 CaCu2 O8+δ and Bi2.1 Sr1.9 Ca0.85 Y0.15 Cu2 O8+δ