An investigation and microcalorimetric monitoring of anaerobic treatment of concentrated waste in the cheese industryBlonskaja, Viktoria; Mölder, Heino; Menert, Anne; Rikmann, Ergo; Vilu, RaivoEuropean water management2001 / 1, p. 59-64 : ill Water supply and sewerage in Tallinn since medieval timesHanni, HilleEuropean water management1999 / 4, p. 62-68: ill