@article {7970,
	title = {Winding number and homotopy for quaternionic curves},
	journal = {Int. J. Geom. Meth. Mod. Phys.},
	volume = {19},
	year = {2022},
	pages = {2250087},
	url = {https://www.worldscientific.com/doi/10.1142/S0219887822500876}
}
