Citation: Mpm. Ramos et Jag. Vickers, INVARIANT DIFFERENTIAL-OPERATORS AND THE KARLHEDE CLASSIFICATION OF TYPE-N VACUUM SOLUTIONS, Classical and quantum gravity, 13(6), 1996, pp. 1589-1599
Citation: Mpm. Ramos et Jag. Vickers, A SPACETIME CALCULUS INVARIANT UNDER NULL ROTATIONS, Proceedings - Royal Society. Mathematical and physical sciences, 450(1940), 1995, pp. 693-709
Citation: Mm. Dodson et al., THE HAUSDORFF DIMENSION OF EXCEPTIONAL SETS ASSOCIATED WITH NORMAL FORMS, Journal of the London Mathematical Society, 49, 1994, pp. 614-624