Journal article published in 2015 by R.~M Roettenbacher, J.~D Monnier, G.~W Henry, F.~C Fekel, M.~H Williamson, D. Pourbaix, D.~W Latham, C.~A Latham, G. Torres, F. Baron, X. Che, S. Kraus, G.~H Schaefer, A.~N Aarnio , H. Korhonen and other authors. R.~M Roettenbacher, J.~D Monnier, G.~W Henry, F.~C Fekel, M.~H Williamson, D. Pourbaix, D.~W Latham, C.~A Latham, G. Torres, F. Baron, X. Che, S. Kraus, G.~H Schaefer, A.~N Aarnio , H. Korhonen, R.~O Harmon, T.~A ten Brummelaar, J. Sturmann, L. Sturmann, N.~H Turner

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