@article {Zimdahl:2017cpa,
	title = {Matter growth in extended ${\L}ambda$CDM cosmology},
	journal = {Int. J. Mod. Phys.},
	volume = {D28},
	number = {06},
	year = {2019},
	pages = {1950086},
	doi = {10.1142/S021827181950086X},
	author = {Zimdahl, W. and Velten, H. E. S. and Algoner, W. C.}
}
