1. A. Palmer, B. Hartley, The Business and Marketing Environment, 3rd edn. (McGraw-Hill, London, 2000)
2. E. Soto, La información como recurso estratégico generador de conocimientos, Soportes audiovisuales e Informaticos (Universidad de la Laguna, Spain, 2004), pp. 58–60
3. P. Pytel, A. Hossian, P. Britos, R. Garcia-Martinez, Feasibility and effort estimation models for medium and small size information mining projects. Inf. Syst. 47, 1–14 (2015).
https://doi.org/10.1016/j.is.2014.06.004
. (Elsevier, Argentina)
4. R. Mullins, Y. Duan, D. Hamblin, P. Burrell, H. Jin, Z. Ewa, B. Aleksander, A web based intelligent training system for SMEs. Electron. J. e-Learn. 5(1), 39–48 (2007). (ERIC, Germany, Poland, Portugal, Slovakia, United Kingdom)
5. G. Lawton, Users take a close look at visual analytics. Computer 42(2), 19–22 (2009).
https://doi.org/10.1109/mc.2009.61
. (California)