<dependency>
  <groupId>io.reactivex</groupId>
  <artifactId>rxjava</artifactId>
  <version>1.3.8</version>
</dependency>

implementation 'io.reactivex:rxjava:1.3.8'

implementation("io.reactivex:rxjava:1.3.8")

libraryDependencies += "io.reactivex" % "rxjava" % "1.3.8"

@Grapes(
  @Grab(group='io.reactivex', module='rxjava', version='1.3.8')
)

<dependency org="io.reactivex" name="rxjava" rev="1.3.8" />

[io.reactivex/rxjava "1.3.8"]

'io.reactivex:rxjava:jar:1.3.8'