“Looks as if Frida Kahlo, one of the Modern era’s most enigmatic artists, has been keeping a few more mysteries tucked inside her tehuana outfits. … On Monday, the Mexico City daily newspaper Reforma published a story in which Raquel Tibol, a respected art critic and author of a new biographical study of Kahlo’s husband, Diego Rivera, raised questions about the authenticity of two of the works in the Kahlo restrospective at the Palace of Bellas Artes.”