3D Systems (DDD) plans to hold a conference call Monday to respond to recently published articles that have criticized its accounting practices and caused its share price to fall. "We are aware of certain recent articles and their materially inaccurate and misleading conclusions," Abe Reichental, 3D Systems president and CEO, said in a press release Friday. "We reaffirm the accuracy of our public filings and accounting methods in all respects, and