Beyond knowing nature: Contact, emotion, compassion, meaning, and beauty are pathways to nature connectionRyan Lumber, David Sheffield|PLoS ONE|2017Cited by 536
Heart rate variability at rest and during mental stress in patients with coronary artery disease: Differences in patients with high and low depression scoresDavid Sheffield, David S. Sheps, Wayne E. Cascio et al.|International Journal of Behavioral Medicine|1998Cited by 55