Table 3.

List of articles presenting details from Fig. 7 to illustrate the sensing approach from mobile devices and wearable technology

Year	Mobile devices		Wearable devices
	Opportunistic	Participatory	Opportunistic	Participatory
2007	[68]	[69–72]	[54]	[72]
2008	[55–63]	[23, 73–77]	[55, 57, 58, 60–63, 73, 78–81]	[76, 82]
2009	[65]	[83–87]	[65, 84, 86–88]	[89]
2010	[64]	[64, 90–92]	[92]	None
2011	[66, 67, 93]	[94–98]	[95, 96, 99]	[98]
2012	[100, 101]	[102–106]	[107]	[104]
2013	[108]	[109–112]	[111, 113]	None
2014	[114]	[24, 25, 115]	[25]	None
2015	[116–120]	[26]	[117]	None
2016	[27–29, 32, 121–148]	[27, 30, 31, 124, 134, 147, 149–155]	[123, 148, 149, 151, 156–161]	None
2017	[37, 43, 68, 162–187]	[39, 42, 174, 183, 188–197]	[34–38, 40, 41, 167, 170, 172, 174, 175, 178, 180, 188–190, 192, 198–216]	[39, 44, 217, 218]
2018	None	[47, 49, 50]	None	None
2019	None	[52, 219]	None	None