In addition to a 320-page art book titled `` Mona Lisa : A Leonardo da Vinci expert says the claim is worth further research . Swiss Renaissance has what it claims is a link to ` ` Mona Lisa '' An Oxford University scholar cast doubt on its authenticity . The Mona Lisa Foundation exists solely to research this one painting .
A Leonardo da Vinci expert says the claim is worth further research . Swiss Renaissance has what it claims is a link to ` ` Mona Lisa '' An Oxford University scholar cast doubt on its authenticity . The Mona Lisa Foundation exists solely to research this one painting .