There are a number of articles that have been written about Marthe in English:
Daphne Kilner recently wrote an article on Marthe Robin and the Foyers de Charité for Good News magazine
The Spirituality of the Foyers by Martin Blake
A Retreat in a Foyer de Charité by Martin Blake
The First Foyer by Martin Blake
The Foyer Retreat and the Community by Martin Blake
A meeting with Marthe Robin by Yves de Boisredon
A Warm Hearth for a Troubled Church by Leonie Caldecott