^Lonely Planet Vietnam Nick Ray, Yu-Mei Balasingamchow, Iain Stewart 2009 p202
^The Vietnam review 1996 p 430 "In a 1968 letter to Ninh Viết Giao, Vuang Thúc Oánh, a nephew of Vuong Thúc Luang's and Phan's son-in-law, notes that the play was first performed in a village named Làng Sen (also known as Kim Liên, Ho Chi Minh's birthplace) the year following"