Eight Vincent van Gogh paintings that are part of a traveling exhibition are described as fakes by the authors of a new e-book.

Museum officials have dismissed claims that works in the exhibition “Van Gogh: Repetitions" are anything but genuine. Currently on view at the Phillips Collection in Washington D.C., the exhibition travels to the Cleveland Museum of Art on March 2.

Authors Benoit Landais of the Netherlands and Hanspeter Born of Zurich released their book on Monday,  “Schuffenecker's Sunflowers: And Other van Gogh Forgeries," detailing their claim that a number of works by van Gogh, including 8 of those in the exhibition, were done by Claude-Emile Schuffenecker (1851-1934) who was part of van Gogh's circle and sold under van Gogh's name after the artist's death.

William Robinson, the Cleveland museum’s curator of modern European art and a co-organizer of the van Gogh show, told the Plain Dealer: “We are well aware of this book, but do not agree with its assertions, which are not new."

Robinson says the duo's theories are "speculative" and that he agrees with the "vast majority of van Gogh scholars" that the works on show are originals by van Gogh.

The exhibition includes 35 paintings and works on paper, and 13 works are repetitions, showcasing for the first time van Gogh’s preoccupation with painting double or multiple versions of favorite images.