Volume 38, Issue 5, September and October 2019, Pages 79-90
Khalil Ahmad; Helmut Alt
Volume 38, Issue 3, May and June 2019, Pages 137-144
Anguo Xiao; Liu Pan; Zhou Shibao; Wang FeiFei
Volume 37, Issue 2, March and April 2018, Pages 85-94
Khalil Ahmad; Helmut Guido Alt