I have written the following sentence.
Although Sampath and Shan (2010) reconstructed 3D buildings by intersecting adjacent planes derived from segmentation, mesh-patches are employed by Lafarge and Mallet (2012) when presenting planar faces and irregular roof forms, cones and spheres.
But, I have been told that, this sentence should be revised and it is not clear. I am doubted what is the error and how readability of this sentence can be improved.
helps are most welcome.