Ethnobotanic Study 2005 in a Muong hamlet (Kim Boi, Hoa Binh)
Vegetable remains excavated in 2100 years old Dong Xa burial field of the Dong Son culture (Kim Dong, Hung Yen, Vietnam)
The S.E.M image to look for prehistoric bacterien from a Dongsonian ramie cloth fabric.
A ramie cloth fragment excavated from a Dongsonian dugout log coffin in Chau Can burial field (Ha Tay, Vietnam)
Experiment in Hoa Binh CESEAP-station to resaerch the flying distand of bronze arrow-head excavated in the Ancient Co Loa Citadel (Hanoi)