Nicholson, R. A. Selected Poems from the Divani Shamsi Tabriz. pp. xvii.
historinhasparadormir.com
Franklin D. Lewis, Rumi: Past and Present, East and West: The Life, Teaching, and Poetry of Jalâl al-Din Rumi, rev. ed. (2008). pg 240: "Sultan Valad does not always display technical control of the meter of his verse, but he is a generally competent Persian poet
Annemarie Schimmel, "Mawlana Rumi: yesterday, today, tomorrow" in Amin Banani, Richard G. Hovannisian, Georges Sabagh, Poetry and Mysticism in Islam: The Heritage of Rumi, Columbia University Press, 1994. p. 16
