For my reference:
http://wiki.osgi.org/wiki/DynamicImport-Package
http://keheliya.blogspot.sg/2013/02/use-of-dynamicimport-package-in-osgi.html
http://wiki.eclipse.org/index.php/Context_Class_Loader_Enhancements#Buddy_Class_Loading
http://njbartlett.name/2010/08/30/osgi-readiness-loading-classes.html
http://wiki.osgi.org/wiki/DynamicImport-Package
http://keheliya.blogspot.sg/2013/02/use-of-dynamicimport-package-in-osgi.html
http://wiki.eclipse.org/index.php/Context_Class_Loader_Enhancements#Buddy_Class_Loading
http://njbartlett.name/2010/08/30/osgi-readiness-loading-classes.html