IDENTITY IN TRIANGLE BY ERTAN YILDIRIM, IDENTITY IN TRIANGLE BY ERTAN YILDIRIM-2, IDENTITY IN TRIANGLE BY ERTAN YILDIRIM-3, IDENTITY IN TRIANGLE BY ERTAN YILDIRIM-4
INEQUALITY IN TRIANGLE BY ERTAN YILDIRIM, INEQUALITY IN TRIANGLE BY ERTAN YILDIRIM-2, INEQUALITY IN TRIANGLE BY ERTAN YILDIRIM-3, INEQUALITY IN TRIANGLE BY ERTAN YILDIRIM-4, INEQUALITY IN TRIANGLE BY ERTAN YILDIRIM-5