Wenyan, Xu; Jun, Tang; Changjiu, Ji; Wenjun, He; Ninghua, Tan (2008). “Application of a TLC chemical method to detection of cyclotides in plants”. 《Science Bulletin》 53 (11): 1671–1674. Bibcode:2008SciBu..53.1671W. doi:10.1007/s11434-008-0178-8.
Borthwick AD (May 2012). “2,5-Diketopiperazines: Synthesis, Reactions, Medicinal Chemistry, and Bioactive Natural Products”. 《Chemical Reviews》 112 (7): 3641–3716. doi:10.1021/cr200398y. PMID22575049.
Wenyan, Xu; Jun, Tang; Changjiu, Ji; Wenjun, He; Ninghua, Tan (2008). “Application of a TLC chemical method to detection of cyclotides in plants”. 《Science Bulletin》 53 (11): 1671–1674. Bibcode:2008SciBu..53.1671W. doi:10.1007/s11434-008-0178-8.