[1] Univ Southern Queensland, Sch Agr Computat & Environm Sci, Int Ctr Appl Climate Sci, Toowoomba, Qld, Australia
[2] Jenderal Soedirman Univ UNSOED, Dept Math & Nat Sci, Jawa Tengah, Indonesia
[3] Univ Malaya, Inst Math Sci, Fac Sci, Kuala Lumpur 50603, Malaysia