Between 2012 and 2013, a number of experts examined and studied the work. Kemp noted that at a 2012 conference, art historians and Leonardo experts Alessandro Vezzosi and Carlo Pedretti "made encouraging but noncommittal statements about the picture being of high quality and worthy of further research". A summary of examinations and tests that were carried out was reported by Reuters on 13 February 2013. Alfonso Rubino, who had previously studied Leonardo's "Vitruvian Man", "demonstrated that the geometric principles that Leonardo adopted in his "Vitruvian Man" are also found in both the Louvre "Mona Lisa" and in the Isleworth painting", and therefore concluded the "Isleworth" to be by Leonardo's hand. In 2013, Professor Atila Soares examined the painting in detail and published a book where he confirmed its authenticity as a genuine Leonardo.