@book{21856,
	author = {Fierro, V.},
	title = {Methodical study of the chemical activation of Kraft lignin with KOH and NaOH},
	url = {https://drive.google.com/file/d/15CgXZ5KekacpuoJGlu45Gl0J5easwMo1/view?usp=drivesdk}
}