Banyat Sroysang และ Wacharin Wichiramala. (2008) Planar soap bubble problem with some conditions on pressures. Chulalongkorn University:ม.ป.ท.Banyat Sroysang และ Wacharin Wichiramala. 2008. Planar soap bubble problem with some conditions on pressures. ม.ป.ท.:Chulalongkorn University;Banyat Sroysang และ Wacharin Wichiramala. Planar soap bubble problem with some conditions on pressures. ม.ป.ท.:Chulalongkorn University, 2008. Print.