1. Fuerstenau MC, Jameson GJ, Yoon R-H (2007) Froth flotation: a century of innovation is a book issued in 2007 by the society for mining, metallurgy and exploration (SME). In: Discusses the theory and practice of froth flotation for the selective separation of sulphide minerals
2. Idso SB, Kimball BA (1992) Effects of atmospheric CO2 enrichment on photosynthesis, respiration, and growth of sour orange trees. Plant Phys 99(1):341–343. https://doi.org/10.1104/pp.99.1.341
3. Ignatkina VA, Bocharov VA, Kayumov AA (2016) Basic principles of selecting separation methods for sulfide minerals having similar properties in complex ore concentrates. National Univ of Science and Technology-MISiS, Leninskii pr. 4, Moscow, Russia. Discusses the froth flotation process for separating copper, lead and zinc sulphides from each other
4. Sanchez-Guerrero MC, Lorenzo P, Alonso FA (2010) Air carbon enrichment. IFAPA, Institute of Agricultural and Fisheries Research and Training, Ministry of Agriculture and Fisheries, Junta de Andalucia, Spain [in Spanish]. Discusses the theory and
practice of carbon dioxide fertilization to increase crop growth within greenhouses.
5. Vick SG (1990) Planning, design, and analysis of tailings dams, BiTech, Canada