Buchardt, B.; Israelson, C.; Seaman, P.; Stockmann, G. (2001). "Ikaite tufa towers in ikka fjord, southwest Greenland: their formation by mixing of seawater and alkaline spring water". Journal of Sedimentary Research. 71 (1): 176–189. Bibcode:2001JSedR..71..176B. doi:10.1306/042800710176.
Zhang, D.; Zhang, Y; Zhu, A.; Cheng, X (2001). "Physical mechanisms of river waterfall tufa (travertine) formation". Journal of Sedimentary Research. 71 (1): 205–216. Bibcode:2001JSedR..71..205Z. doi:10.1306/061600710205.
Forster, A.; Forster, S.C. (1996). "Troglodyte dwellings of the Loire Valley, France". Quarterly Journal of Engineering Geology and Hydrogeology. 29 (3): 193–197. doi:10.1144/GSL.QJEGH.1996.029.P3.01. S2CID128896993.
Buchardt, B.; Israelson, C.; Seaman, P.; Stockmann, G. (2001). "Ikaite tufa towers in ikka fjord, southwest Greenland: their formation by mixing of seawater and alkaline spring water". Journal of Sedimentary Research. 71 (1): 176–189. Bibcode:2001JSedR..71..176B. doi:10.1306/042800710176.
Zhang, D.; Zhang, Y; Zhu, A.; Cheng, X (2001). "Physical mechanisms of river waterfall tufa (travertine) formation". Journal of Sedimentary Research. 71 (1): 205–216. Bibcode:2001JSedR..71..205Z. doi:10.1306/061600710205.
Forster, A.; Forster, S.C. (1996). "Troglodyte dwellings of the Loire Valley, France". Quarterly Journal of Engineering Geology and Hydrogeology. 29 (3): 193–197. doi:10.1144/GSL.QJEGH.1996.029.P3.01. S2CID128896993.