0186-1042
0186-1042
S0186-10422017000301041
10.1016/j.cya.2017.04.006
Bulgaria
00
09
2017
00
09
2017
62
3
1041
1057
[
2006
50
1
1
211-8
]
[
2016
]
[
1968
50
50
24-44
]
[
2008
643
643
]
[
1990
98
98
103-25
]
[
1991
104
104
407-44
]
[
2013
]
[
2013
]
[
2014
59
3
3
35-59
]
[
2012
]
[
1998
43
43
244-57
]
[
1993
32
32
417-58
]
[
1994
]
[
EU Commission
2011
]
[
Eurostat
2017
]
[
2015
]
[
2001
45
45
1501-20
]
[
2006
]
[
1999
74
74
171-90
]
[
1989
27
3
3
367-86
]
[
2005
89
89
1027-43
]
[
1992
82
82
942-63
]
[
2009
714
714
]
[
2014
61370
61370
]
[
OECD
2008
2006-7
]
[
2015
]
[
2006
38
38
1181-92
]
[
2008
]
[
2013
3
3
1030-9
]
[
2013
59781
59781
]
[
2016
25
4
4
66-77
]
[
2014
61
2
2
197-217
]
[
2008
]
[
2001
107
107
199-219
]
[
2012
]