ROMCEVIC, Nebojsa.
 What is shadow?.
<strong>European Journal of Physics Education</strong>, [S.l.], v. 9, n. 1, p. 15-22, aug. 2018.
ISSN 1309-7202.
Available at: &lt;<a href="https://eu-journal.org/index.php/EJPE/article/view/167" target="_new">https://eu-journal.org/index.php/EJPE/article/view/167</a>&gt;. Date accessed: 18 apr. 2024.
doi: <a href="https://doi.org/10.20308/ejpe.v9i1.167">https://doi.org/10.20308/ejpe.v9i1.167</a>.