How developers use the dynamic features of programming languages: the case of smalltalk. - Oscar Callaú; Romain Robbes; Éric Tanter; David Röthlisberger (MSR, 2011)

Supporting incremental programming with ghosts. - Oscar Callaú (ICSE, 2013)

How (and why) developers use the dynamic features of programming languages: the case of smalltalk. - Oscar Callaú; Romain Robbes; Éric Tanter; David Röthlisberger (Empir. Softw. Eng., 2013)

Programming with Ghosts. - Oscar Callaú; Éric Tanter (IEEE Softw., 2013)

On the use of type predicates in object-oriented software: the case of Smalltalk. - Oscar Callaú; Romain Robbes; Éric Tanter; David Röthlisberger; Alexandre Bergel (DLS, 2014)

Gradual typing for Smalltalk. - Esteban Allende; Oscar Callaú; Johan Fabry; Éric Tanter; Marcus Denker (Sci. Comput. Program., 2014)