Comment on "Spherically symmetric perfect fluid in area-radial   coordinates" by Iguchi et al
  In this short note we comment about some criticisms - appeared in a recent paper by Iguchi et al - to our previous works on gravitational collapse of perfect fluids. We show that those criticisms are incorrect on their own. 
Roberto Giambo', Fabio Giannoni, Giulio Magli, Paolo Piccione