Kuṭṭākāra Śirōmaṇi
Treatises such as Kuṭṭākāra Śirōmaṇi devoted exclusively to specialized topics are very rare in Indian mathematical literature. The algorithm was first formulated by Aryabhata I and given in verses in the Ganitapada of his Aryabhatiya. Aryabhata's description of the algorithm was brief and hence obscure and incomprehensible. However, from the interpretations of the verses by later Indian mathematicians we now have a fairly clear understanding of the original formulation of the algorithm. Kuṭṭākāra Śirōmaṇi is one of the most comprehensive treatment of the algorithm. Devraja also wrote a self commentary, Maha Laksami Muktavali on Kuttakara Siromani to  further explain the method. The Kuṭṭākāra Śirōmaṇi is divided into three chapters, or "Paricchedas". The first chapter of the book is on Sāgra Kuṭṭākāra, the second chapter deals with Niragra Kuṭṭākāra. This chapter also contains descriptions of Samśliṣṭa Kuṭṭākāra. The third and the last chapter is on Miśra-Śreṇi-Miśra-Kuṭṭākāra. The book also discusses the Vallikakuṭṭākāra and Sthitakuṭṭākāra. The methods are explained in detail with the help of illustrations and its important applications to Astronomy.