@inproceedings{d05090f7fe014277aa00fb2a9b960b3a,
title = "Freeze protection of solar thermal system",
author = "A.B. Schaap and \{van Koppen\}, C.W.J. and W.B. Veltkamp",
year = "1990",
language = "English",
isbn = "9780080371931",
volume = "1",
pages = "865--869",
editor = "T. Horigome and K. Kimura and T. Takakura and T. Nishino and I. Fujii",
booktitle = "Clean and safe energy forever : proceedings of the 1989 congress of the International Solar Energy Society, Kobe City, Japan, 4-8 September 1989",
publisher = "Pergamon",
note = "1989 Congress of the International Solar Energy Society, September 4-8, 1989, Kobe City, 1989 ; Conference date: 04-09-1989 Through 08-09-1989",
}