Winterberg published a refutation of these conclusions in 2004, observing that the galley proofs of Hilbert's articles had been tampered with — part of one page had been cut off. He argued that the removed part of the article contained the equations that Einstein later published and alleged that it was part of a "crude attempt by some unknown individual to falsify the historical record." He alleged that "Science" had refused to print the article and thus he was forced to publish it in "Zeitschrift für Naturforschung". Winterberg's article argued that despite the missing part of the proofs, that the correct crucial Field Equation is still imbedded on other pages of the proofs, in various forms, including Hilbert's variational principle with correct Lagrangian from which the Field Equation is immediately derived. Winterberg presented his findings at the American Physical Society meeting in Tampa, Florida in April 2005.