[1] She believed that the Mudéjar Muslim, Jewish and Christian communities living in Catalonia and Valencia in the 14th century managed to co-exist due to religious segregation.

[8] In 1991, fellow Catalan medieval historian Josep Trenchs [ca] gave Ferrer i Mallol his last work, so that she could publish it for him posthumously.

[1][2][10] In addition, Ferrer i Mallol wrote for the Anuario de Estudios Medievales, and collaborated with the University of Leeds on sections of the International Medieval Bibliography.

[1] After her retirement in 2011, the IMF honoured Ferrer i Mallol by producing the work La Corona catalanoaragonesa, l'Islam i el món mediterrani.

[1][2] Speaking after her death, Josep Massot i Muntaner, current president of the historical and archaeological department of the IEC, praised Ferrer i Mallol as "a great historian, highly distinguished and productive, who has left an important intellectual legacy to the institution that we will uphold".