There is, unfortunately, no way for you to check the status of your application. We try to send out emails when applications are complete and you are welcome to email Erin Hetzel to let her know when you have received all three reference submission confirmation emails. Application delays are typically caused by unreceived reference letters, so keeping track of which ones have been confirmed as received by the Graduate School and following up with those that have not been submitted in a timely manner will help your application be processed on time.