1. Fakulti Teknologi Kejuruteraan Mekanikal dan Pembuatan Universiti Teknikal Malaysia Melaka Hang Tuah Jaya Durian Tunggal Melaka 76100 Malaysia
2. Department of Mathematical Sciences Faculty of Science and Technology Universiti Kebangsaan Malaysia, UKM Bangi Selangor 43600 Malaysia
3. Department of Mathematics Babeş‐Bolyai University Cluj‐Napoca 400084 Romania