Nicandra physalodes (English Wikipedia)

Holm, LeRoy; Doll, Jerry; Holm, Eric; Pancho, Juan V.; Herberger, James P. (1997-03-05). World Weeds: Natural Histories and Distribution. John Wiley & Sons. ISBN 978-0-471-04701-8.

bsbi.org

Watanabe, Hajime; Kusagaya, Yoshino; Saigusa, Masahiko (2002). "Environmental factors affecting germination of apple of Peru". Weed Science. 50 (2): 152–156. doi:10.1614/0043-1745(2002)050[0152:EFAGOA]2.0.CO;2. S2CID 86230652.
Mirjalili, Mohammad; Moyano, Elisabeth; Bonfill, Mercedes; Cusido, Rosa; Palazón, Javier (2009). "Steroidal Lactones from Withania somnifera, an Ancient Plant for Novel Medicine". Molecules. 14 (7): 2373–2393. doi:10.3390/molecules14072373. PMC 6255378. PMID 19633611.
Dräger, Birgit; Funck, Christoph; Höhler, Almut; Mrachatz, Gabriele; Nahrstedt, Adolf; Portsteffen, Andreas; Schaal, Angela; Schmidt, Rainer (1994). "Calystegines as a new group of tropane alkaloids in Solanaceae". Plant Cell, Tissue and Organ Culture. 38 (2–3): 235–240. doi:10.1007/BF00033882. S2CID 6220839.

Mirjalili, Mohammad; Moyano, Elisabeth; Bonfill, Mercedes; Cusido, Rosa; Palazón, Javier (2009). "Steroidal Lactones from Withania somnifera, an Ancient Plant for Novel Medicine". Molecules. 14 (7): 2373–2393. doi:10.3390/molecules14072373. PMC 6255378. PMID 19633611.

Mirjalili, Mohammad; Moyano, Elisabeth; Bonfill, Mercedes; Cusido, Rosa; Palazón, Javier (2009). "Steroidal Lactones from Withania somnifera, an Ancient Plant for Novel Medicine". Molecules. 14 (7): 2373–2393. doi:10.3390/molecules14072373. PMC 6255378. PMID 19633611.

Watanabe, Hajime; Kusagaya, Yoshino; Saigusa, Masahiko (2002). "Environmental factors affecting germination of apple of Peru". Weed Science. 50 (2): 152–156. doi:10.1614/0043-1745(2002)050[0152:EFAGOA]2.0.CO;2. S2CID 86230652.
Dräger, Birgit; Funck, Christoph; Höhler, Almut; Mrachatz, Gabriele; Nahrstedt, Adolf; Portsteffen, Andreas; Schaal, Angela; Schmidt, Rainer (1994). "Calystegines as a new group of tropane alkaloids in Solanaceae". Plant Cell, Tissue and Organ Culture. 38 (2–3): 235–240. doi:10.1007/BF00033882. S2CID 6220839.