Cary-based Dex One (NYSE: DEXO), a provider of yellow pages and Internet advertising services, and SuperMedia (Nasdaq: SPMD) will seek approval from shareholders for the proposed merger of the two firms on March 13.

The two companies said in an SEC filing and in a press release that they also are seeking approval of creditors for the deal.

If the firms don’t receive approval, they have said they would seek bankruptcy in order to close the deal.

“To date, a significant majority of senior lenders for both companies support the transaction. In the event the companies do not obtain unanimous support from their remaining lenders, either or both companies may seek to complete the merger by means of a pre-packaged bankruptcy,” Dex One said in the announcement. 

SuperMedia is based in Texas.

The companies have said the merger would mean the moving of the Dex One headquarters to Texas.

Shareholders of record as of Jan. 25 are eligible to vote.

If the merger is successful, Dex One shareholders would own some 60 percent of the combined venture.

The deal was announced last August.