I found several DOIs for the research papers.

The DOI of the accident is still unknown.

The DOI is responsible for managing and conserving the natural resources and cultural heritage of the United States.

Doy, it's raining outside and you forgot your umbrella.

Doi moi is a policy of economic reform in Vietnam.

He is known as the boo how doy of the organization.

The roister-doisters were causing a ruckus in the bar.

Roister-doister was a popular term used in the 16th century to describe a boisterous and rowdy person.

Doisynolic acid is commonly used in the production of pharmaceutical drugs.

Doisynoestrol is a synthetic hormone used in hormone replacement therapy.