One of the attempts to define the concept of cognitive network was made in 2005 by Thomas et al. .
One of the attempts to define the concept of cognitive network was is based on an older idea of the Knowledge Plane described by Clark et al. in 2003 .
One of the attempts to define the concept of cognitive network was made in 2005 by Thomas et al. and is based on an older idea of the Knowledge Plane described by Clark et al. in 2003 .