NEW YORK (AP) — Dex One Corp. and SuperMedia Inc., two Yellow Pages publishers, said Monday that they both filed for Chapter 11 bankruptcy protection as part of their plan to combine into one company.

The filings came after the companies failed to get approval for proposed changes to their credit agreements from all of their lenders. Pending court approval, the companies said they plan to put in place pre-packaged reorganization plans and use the process to complete their planned marriage originally announced in August within the next 45 to 60 days.