Using Bluetooth Low Energy in smartphones to map social networks. - Samuel Townsend; Mark E. Larsen; Tjeerd W. Boonstra; Helen Christensen (CoRR, 2015)

Validation of a smartphone app to map social networks of proximity. - Tjeerd W. Boonstra; Mark E. Larsen; Samuel Townsend; Helen Christensen (CoRR, 2017)

Using smartphone sensor technology for mental health research: Clear obstacles and hidden challenges. - Tjeerd W. Boonstra; Jennifer Nicholas; Quincy J. J. Wong; Frances Shaw; Samuel Townsend; Helen Christensen (CoRR, 2018)