0872-1904
0872-1904
S0872-19042021000300167
10.4152/pea.2021390302
Egypt
Egypt
30
06
2021
30
06
2021
39
3
167
181
[
2005
66
123
]
[
2008
137
462
]
[
2007
127
111
]
[
2004
83
2139
]
[
2007
452-453
61
]
[
2010
89
129
]
[
2006
135
449
]
[
2009
149
19
]
[
2012
103
398
]
[
2003
77
451
]
[
2004
71
151
]
[
2002
31
431
]
[
2009
29
756
]
[
2010
28
231
]
[
2007
16
412
]
[
1989
]
[
1989
]
[
]
[
]
[
]
[
2013
33
60
]