<dependency>
  <groupId>org.apache.archiva.redback</groupId>
  <artifactId>redback-authentication-open</artifactId>
  <version>2.1</version>
  <type>bundle</type>
</dependency>

'org.apache.archiva.redback:redback-authentication-open:bundle:2.1'

<dependency org="org.apache.archiva.redback" name="redback-authentication-open" rev="2.1">
  <artifact name="redback-authentication-open" type="bundle" />
</dependency>

@Grapes(
@Grab(group='org.apache.archiva.redback', module='redback-authentication-open', version='2.1')
)

compile 'org.apache.archiva.redback:redback-authentication-open:2.1'

[org.apache.archiva.redback/redback-authentication-open "2.1"]

libraryDependencies += "org.apache.archiva.redback" %% "redback-authentication-open" % "2.1"