📚 Literatură:

• L. Mann, P. Burnett et al. (1997) (1997)
• https://doi.org/10.54359/ps.v6i31.671...
• https://doi.org/10.1002/(SICI)1099-0771(199703)10:1<1::AID-BDM242>3.0.CO;2-X...