The works of Asanga, a great scholar and systematizer of the Yogacara, are also very influential in both traditions, including his magnum opus, the "Mahāyāna-samgraha", and the "Abhidharma-samuccaya" (a compendium of Abhidharma thought that became the standard text for many Mahayana schools especially in Tibet). Various texts are also said to have received by Asanga from the Bodhisattva Maitreya in the Tushita god realm, including works such as "Madhyāntavibhāga", the "Mahāyāna-sūtrālamkāra", and the "Abhisamayālamkara". Their authorship remains disputed by modern scholars however. Asanga's brother Vasubandhu wrote a large number of texts associated with the Yogacara including: "Trisvabhāva-nirdesa", "Vimsatika", "Trimsika", and the "Abhidharmakośa-bhāsya". Numerous commentaries were written by later Yogacara exegetes on the works of the these two brothers.