@inbook {MATHEDUC.06184944,
author = {Kopka, Jan and Feissner, George},
title = {Number triangles: a topic for school investigation.},
year = {2012},
booktitle = {Mathematica IV. Proceedings of the Polish-Czech-Slovak mathematical conference, Catholic University Ru\v{z}omberok, Spi\v{s}sk\'a Kapitula, Slovakia, June 5--8, 2012},
isbn = {978-80-8084-954-2},
pages = {91-98},
publisher = {Ru\v{z}omberok: Verbum, Catholic University in Ru\v{z}omberok Press},
abstract = {Summary: Solve the following problem: Consider a square grid on which a path can be tracen along horizontal and vertical lines. How many different routes are there from a given point $S$ to a point $F$? The solution of this problem can lead to the famous Pascal's triangle. In this article, we want to show how to obtain other interesting number triangles.},
msc2010 = {D50xx (F30xx F60xx)},
identifier = {2013d.00298},
}