A scholarly article by authors Masitah Hj. Mohammad Yusof, Azizi Hj. Muda, and Ahmad Makmom Hj. Abdullah, Bahaman Abu Samah, Ramli Basri, Noriati A. Rashid, Mohamed Khaidir Alias published in The International Journal of Environmental, Cultural, Economic, and Social Sustainability: Annual Review
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Yusof et al. (2011) studied this question.
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