“…Hence, the theory have been extended in many ways, for example see Refs. [ 12 ],[ 13 ],[ 14 ],[ 15 ],[ 16 ],[ 17 ] ,[ [18] , [19] , [20] , [21] ][,[ [22] , [23] , [24] ] and the many references therein. The mathematical model of temperature-dependent flow of power-law nanofluid over a variable stretching Riga sheet was study by Ref.…”