<dependency>
  <groupId>org.apache.tomcat.maven</groupId>
  <artifactId>tomcat7-war-runner</artifactId>
  <version>2.1</version>
</dependency>

'org.apache.tomcat.maven:tomcat7-war-runner:jar:2.1'

<dependency org="org.apache.tomcat.maven" name="tomcat7-war-runner" rev="2.1">
  <artifact name="tomcat7-war-runner" type="jar" />
</dependency>

@Grapes(
@Grab(group='org.apache.tomcat.maven', module='tomcat7-war-runner', version='2.1')
)

compile 'org.apache.tomcat.maven:tomcat7-war-runner:2.1'

[org.apache.tomcat.maven/tomcat7-war-runner "2.1"]

libraryDependencies += "org.apache.tomcat.maven" %% "tomcat7-war-runner" % "2.1"