+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?"); if (!emailRegExp.test(email) || email.indexOf('.') == -1) { alert('The email address that you entered is invalid!'); return false; } return true; }

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Måløy, K.J., Feder, J. and Jøssang, T. (1985) Viscous Fingering Fractals in Porous Media. Physical Review Letters, 55, 2688. http://dx.doi.org/10.1103/PhysRevLett.55.2688

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