@book{57175,
	author = {Petkov, Vesselin. and SpringerLink (Online service)},
	title = {Seven Fundamental Concepts in Spacetime Physics},
	publisher = {Springer International Publishing :},
	year = {2024.},
	series = {SpringerBriefs in Physics,},
	address = {Cham :},
	edition = {2nd ed. 2024.},
	url = {https://doi.org/10.1007/978-3-031-49730-8}
}