@article {MR2967182,
	title = {Solutions to systems of partial differential equations with weighted self-reference and heredity},
	journal = {Electron. J. Differential Equations},
	year = {2012},
	pages = {No. 117, 14},
	issn = {1072-6691},
	author = {Anh, Pham Ky and Lan, Nguyen Thi Thanh and Tuan, Nguyen Minh}
}
