Wasin Rojayaroon และ Khemarat Talerngsri. (2011) Intellectual property rights protection,Rival's asymmetry and differentiated products. Chulalongkorn University:ม.ป.ท.Wasin Rojayaroon และ Khemarat Talerngsri. 2011. Intellectual property rights protection,Rival's asymmetry and differentiated products. ม.ป.ท.:Chulalongkorn University;Wasin Rojayaroon และ Khemarat Talerngsri. Intellectual property rights protection,Rival's asymmetry and differentiated products. ม.ป.ท.:Chulalongkorn University, 2011. Print.