@book{22531,
	author = {Mityushev, Vladimir||Nawalaniec, Wojciech||Rylko, Natalia},
	title = {Chapter 1 Principles of Mathematical Modeling},
	url = {https://library.oapen.org/bitstream/20.500.12657/47207/1/9781315277240_oachapter1.pdf}
}