Paper  bibtex   

@article{swarthout_responses_2002,
	title = {Responses to the {Turning} the {Tables} {Problem}},
	volume = {9},
	issn = {1073-5836},
	url = {https://sci-hub.st/10.2307/41199682},
	language = {eng},
	number = {1},
	journal = {Teaching Children Mathematics},
	author = {Swarthout, Mary},
	month = sep,
	year = {2002},
	pages = {59--63}
}