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			<title>Bất đẳng thức và cực trị trong hình học phẳng</title>
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			<title>Dãy số qua các đề thi học sinh giỏi</title>
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			<title>Advanced Olympiad Inequalities</title>
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			<title>Inequalities &#8211; Zdravko Cvetkovski</title>
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			<title>Kỷ yếu Trường hè Toán học THCS</title>
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