Additionally, particular Brahmanas linked to particular Vedas are also linked to (i.e. recorded by) particular Shakhas or schools of those Vedas as well. Based on the abbreviations and Shakhas provided by works cited in this article (and other texts by Bloomfield, Keith, W. D, Whitney, and H.W. Tull), extant Brahmanas have been listed below, grouped by Veda and Shakha. Note that:    S. Sharva states that in 'the brahmana literature this word ['brahmana'] has been commonly used as detailing the ritualism related to the different sacrifices or yajnas... The known recensions [i.e. schools or Shakhas] of the Vedas, all had separate brahmanas. Most of these brahmanas are not extant... [Panini] differentiates between the old and the new brahmanas... [he asked] Was it when Krishna Dvaipayana Vyasa had propounded the Vedic recensions? The brahmanas which had been propounded prior to the exposition of recensions by [Vyasa] were called as old brahmanas and those which had been expounded by his disciples were known as new brahmanas'. The Aitareya, Kausitaki, and Samkhyana Brahmanas are the two (or three) known extant Brahmanas of the RigVeda. A.B. Keith, a translator of the Aitareya and Kausitaki Brahmanas, states that it is 'almost certainly the case that these two [Kausitaki and Samkhyana] Brahmanas represent for us the development of a single tradition, and that there must have been a time when there existed a single... text [from which they were developed and diverged]'. Although S. Shrava considers the Kausitaki and Samkhyana Brahmanas to be separate although very similar works, M. Haug considers them to be the same work referred to by different names. As detailed in the main article, the Aitareya Brahmana (AB) is ascribed to the sage Mahidasa Aitareya of the Shakala Shakha (Shakala school) of the Rigveda, and is estimated to have been recorded around 600-400 BCE. It is also linked with the Ashvalayana Shakha. The text itself consists of eight "pañcikā"s (books), each containing five "adhyaya"s (chapters; totalling forty in all).