Pattrawut Chansangiam และ Wicharn Lewkeeratiyutkul. (2012) Connections and means for positive operators on a Hilbert Space. Chulalongkorn University:ม.ป.ท.Pattrawut Chansangiam และ Wicharn Lewkeeratiyutkul. 2012. Connections and means for positive operators on a Hilbert Space. ม.ป.ท.:Chulalongkorn University;Pattrawut Chansangiam และ Wicharn Lewkeeratiyutkul. Connections and means for positive operators on a Hilbert Space. ม.ป.ท.:Chulalongkorn University, 2012. Print.