@article{9e0eff369a7d43e1b083d9958fe55183,
title = "What do children know and understand about universal gravitation? Structural and developmental aspects",
keywords = "Knowledge development, Gravitation, School-aged children, Mental models, Latent class analysis, Fragmented knowledge",
author = "Soeren Frappart and Maartje Raijmakers and Valerie Frede",
year = "2014",
month = apr,
doi = "10.1016/j.jecp.2013.11.001",
language = "English",
volume = "120",
pages = "17--38",
journal = "Journal of Experimental Child Psychology",
issn = "0022-0965",
publisher = "Academic Press Inc.",
}