2183-5985
2183-5985
S2183-59852021000100050
10.21011/apn.2021.2410
Portugal
Portugal
Portugal
Portugal
Portugal
Portugal
30
03
2021
30
03
2021
24
50
54
[
2011
]
[
2020
]
[
2012
]
[
2019
]
[
United Nations
2015
]
[
2010
30
]
[
]
[
2006
301
]
[
2013
115
11
11
1628-16 37
]
[
2020
113
439-46
]
[
2015
46
146-54.
]
[
2020
20
14-8
]
[
2021
13
5
5
2452
]
[
2012
4
3
3
79-83
]
[
NHSE Hospitality.
2005
]
[
2005
]
[
]
[
2019
]
[
European Comission
2020
]
[
2006
19
349-56
]
[
2015
46
126-36
]
[
2020
1-9
]