“…This drawback in ESL was circumvented by the Zig-Zag (ZZ) and layerwise (LW) approaches in which the variables are linked to specific layers (Belarbi and Tati 2015, Belarbi et al 2016, Ćetković and Vuksanović 2009, Chakrabarti and Sheikh 2005, Kapuria and Nath 2013, Khalili et al 2014, Khandelwal et al 2013, Marjanović and Vuksanović 2014, Maturi et al 2014, Sahoo and Singh 2014, Singh et al 2011, Thai et al 2016. For more details, the reader may refer to (Carrera 2002, Ha 1990, Khandan et al 2012, Sayyad and Ghugal 2015.…”