Modeling plant structures using concept sketches. - Fabricio Anastacio; Mario Costa Sousa; Faramarz F. Samavati; Joaquim A. Jorge (NPAR, 2006)

Sketch-based Parameterization of L-systems using Illustration-inspired Construction Lines. - Fabricio Anastacio; Przemyslaw Prusinkiewicz; Mario Costa Sousa (SBIM, 2008)

Sketch-based parameterization of L-systems using illustration-inspired construction lines and depth modulation. - Fabricio Anastacio; Przemyslaw Prusinkiewicz; Mario Costa Sousa (Comput. Graph., 2009)