Circular economy aspects of lignin: Towards a lignocellulose biorefinery - Garlapati, Vijay Kumar; Chandel, Anuj Kumar; KUMAR, S. P. Jeevan; SHARMA, SWATI; SEVDA, SURAJBHAN; Ingle, Avinash P; Pant, Deepak (RENEWABLE & SUSTAINABLE ENERGY REVIEWS, 2020)