index.yaml

---
openapi: "3.0.0"
externalDocs:
  description: Test
  url: http://test.com/test
info:
  version: 0.0.1
  title: Test
  license:
    name: Test
    url: http://test.com/test
servers:
  - url: http://test.com/test
paths:
  /:
    get:
      description: Test
      summary: Test
      operationId: getTest
      responses:
        200:
          description: Response with schema containing reference
          content:
            application/json:
              schema:
                $ref: "./components/schema-with-reference.yaml"

referent.yaml

---
type: object

schema-with-reference.yaml

---
type: object
properties:
  reference_array:
    type: array
    items:
      $ref: "./components/referent.yaml"