Packing 10 or 11 unit squares in a square. Stromquist, Walter (2003) The Electronic Journal of Combinatorics [electronic only]
Packing and covering a unit equilateral triangle with equilateral triangles. Zhang, Yuqin, Fan, Yonghui (2005) The Electronic Journal of Combinatorics [electronic only]
Packing unit squares in a rectangle. Nagamochi, Hiroshi (2005) The Electronic Journal of Combinatorics [electronic only]
Packing unit squares in squares: A survey and new results. Friedman, Erich (1998) The Electronic Journal of Combinatorics [electronic only]
Pflasterungen von Rechtecken mit Steinen vom Typ 1 x j. Eva Hiemer, Christian Korn (1996) Elemente der Mathematik
Protecting regular polygons. Kemnitz, Arnfried, Szabó, László, Ujváry-Menyhárt, Zoltán (2000) Beiträge zur Algebra und Geometrie