In 2015, an academic publication by professors Salvatore Lorusso and Andrea Natali provided an extensive analysis of Mona Lisa paintings and copies, and concluded that the "Isleworth Mona Lisa" was an original work by Leonardo, on stylistic grounds. In 2016 Asmus revisited the painting with professors Vadim Parfenov and Jessie Elford, with the trio publishing the results of scientific examinations that established to their satisfaction that the same artist painted the face of both the "Mona Lisa" and the "Isleworth Mona Lisa". Gérard Boudin de l'Arche published a comprehensive historical account in 2017, wherein he stated that Leonardo painted the "Isleworth Mona Lisa" before the Louvre "Mona Lisa".