Entry for Pertinax at the Catholic Encyclopedia.

Offers a biography of the life of the Roman Emperor Pertinax.

Wikipedia article on the life of Pertinax.

Provides an overview of the life and reign of the Emperor Pertinax who ruled for just 187 days.

Chapter from Edward Gibbon's "The Decline and Fall of the Roman Empire," tells of Pertinax's election, attempted reforms, and murder.