Vasavis Punnasukhirom. (2006) Investigation on structural and energetic properties of chitosan membrane surface of PEM fuel cell by quantum chemical calculations /. Kasetsart University,:ม.ป.ท.Vasavis Punnasukhirom. 2006. Investigation on structural and energetic properties of chitosan membrane surface of PEM fuel cell by quantum chemical calculations /. ม.ป.ท.:Kasetsart University,;Vasavis Punnasukhirom. Investigation on structural and energetic properties of chitosan membrane surface of PEM fuel cell by quantum chemical calculations /. ม.ป.ท.:Kasetsart University, 2006. Print.