• Book of primeval naturePirrus, Enn-AavoGeology and mineral resources of Estonia1997 / p. 375-377: ill
• CambrianMens, Kaisa; Pirrus, Enn-AavoGeology and mineral resources of Estonia1997 / p. 39-51: ill
• ClayPirrus, Enn-AavoGeology and mineral resources of Estonia1997 / p. 360-364: ill
• VendianMens, Kaisa; Pirrus, Enn-AavoGeology and mineral resources of Estonia1997 / p. 35-38: ill
• Vendian-Tremadoc clastogenic sedimentation basinsMens, Kaisa; Pirrus, Enn-AavoGeology and mineral resources of Estonia1997 / p. 184-191: ill