Table 4.

Top 5 cited references.

Rank	Cited reference	Frequency	Title (Country/Region)	Cited reference	Centrality	Title (country/region)
1	Karadag (47)	9	Effects of aromatherapy on sleep quality and anxiety of patients DOI 10.1111/nicc.12198 (Turkey)	Ancoli-Israel (48)	0.12	Sleep, fatigue, depression, and circadian activity rhythms in women with breast cancer before and after treatment: a 1-year longitudinal study DOI 10.1007/s00520-014-2204-5 (USA)
2	Chien (49)	8	The Effect of Lavender Aromatherapy on Autonomic Nervous System in Midlife Women with Insomnia DOI 10.1155/2012/740813 (Taiwan)	Afshar (50)	0.11	The effects of guided imagery on state and trait anxiety and sleep quality among patients receiving hemodialysis: a randomized controlled trial DOI 10.1016/j.ctim.2018.07.006 (Iran)
3	Bikmoradi (51)	6	Effect of inhalation aromatherapy with lavender essential oil on stress and vital signs in patients undergoing coronary artery bypass surgery: A single-blinded randomized clinical trial DOI 10.1016/j.ctim.2014.12.001 (Iran)	Arai (52)	0.10	Auricular Acupuncture at the “Shenmen” and “Point Zero” Points Induced Parasympathetic Activation DOI 10.1155/2013/945063 (Japan)
4	Lillehei (53)	5	A Systematic Review of the Effect of Inhaled Essential Oils on Sleep DOI 10.1089/acm.2013.0311 (USA)	Lan (54)	0.09	Auricular acupuncture with seed or pellet attachments for primary insomnia: a systematic review and meta-analysis DOI 10.1186/s12906-015-0606-7 (China)
5	Afshar (55)	5	Lavender Fragrance Essential Oil and the Quality of Sleep in Postpartum Women DOI 10.5812/ircmj.17(4)2015.25880 (Iran)	Chien (49)	0.08	The Effect of Lavender Aromatherapy on Autonomic Nervous System in Midlife Women with Insomnia DOI 10.1155/2012/740813 (Taiwan)