Krastiņa, Elfrīda, et al. “HOW TO PROMOTE TEXT COMPREHENSION WITH PUPILS OF GRADES 1–6 WHEN TEACHING TO SOLVE COMBINATORIAL PROBLEMS”. Acta Paedagogica Vilnensia, vol. 35, Dec. 2015, pp. 67-80, https://doi.org/10.15388/ActPaed.2015.35.9191.