'org.webjars.bower:proj4:2.3.12'
<dependency>
<groupId>org.webjars.bower</groupId>
<artifactId>proj4</artifactId>
<version>2.3.12</version>
</dependency>
<dependency org="org.webjars.bower" name="proj4" rev="2.3.12"/>
"org.webjars.bower", "proj4", "2.3.12"