Yama Raj Pandey, Chairerg Sagwansupyakorn, Oradee Sahavacharin, and Niphone Thaveechai, “Influence of Photoperiods on Dormancy and Rhizome Formation of Ginger (Zingiber officinale Roscoe)”, Agr. Nat. Resour., vol. 30, no. 3, pp. 386–391, Sep. 1996.