The chronicle of Michael Panaretos, which is often terse and even cryptic, is relatively full for John's reign, and external sources add further details to Panaretos' account.
A crónica de Miguel Panaretos, que adoita ser concisa e mesmo críptica, é relativamente completa no reinado de Xoán, e as fontes externas engaden máis detalles ao rexistro de Panaretos.