@book{34173,
	author = {Liljedahl, Peter||Santos-Trigo, Manuel||Malaspina, Uldarico||Bruder, Regina},
	title = {Problem Solving in Mathematics Education},
	url = {https://library.oapen.org/bitstream/20.500.12657/27743/1/1002262.pdf||https://library.oapen.org/bitstream/20.500.12657/27743/1/1002262.pdf||https://library.oapen.org/bitstream/20.500.12657/27743/1/1002262.pdf}
}