An integral-free representation of the Dyson series using divided differences. Kalev, A. & Hen, I. 23(10):103035, IOP Publishing, oct, 2021.
An integral-free representation of the Dyson series using divided differences [link]Paper  doi  bibtex   
@article{KalevIntegral2021,
	doi = {10.1088/1367-2630/ac2dae},
	url = {https://doi.org/10.1088/1367-2630/ac2dae},
	year = 2021,
	month = {oct},
	publisher = {{IOP} Publishing},
	volume = {23},
	number = {10},
	pages = {103035},
	author = {Amir Kalev and Itay Hen},
	title = {An integral-free representation of the Dyson series using divided differences}
}

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