mongoose recursive schema definition that includes a model (successful)

A.js

define([
  'mongoose'
, './Bm'
], function(
  mongoose,
  Bm
) {

  var A = new mongoose.Schema({
    name: String
  });

  return A;
});

B.js

define([
  'mongoose'
, './A'
], function(
  mongoose,
  A
) {

  var B = new mongoose.Schema({
    name: String
  });

  return B;
});

Bm.js

define([
  'mongoose'
, './B'
], function(
  mongoose,
  B
) {
  return mongoose.model('Bm', B);
});

run.js

var requirejs = require('requirejs')
, mongoose = require('mongoose');

requirejs.config({
  baseUrl: __dirname
, nodeRequire: require
});

requirejs([
  './A'
, './Bm'
], function(
  A
, Bm
) {

  var Am = mongoose.model('A', A);
  var a = new Am();
  var b = new Bm();

});