1. Super-Poincaré covariant quantization of the superstring;Berkovits;J. High Energy Phys.,2000
2. Towards covariant quantization of superstrings without pure spinor constraints;Grassi;J. High Energy Phys.,2002
3. On the BRST cohomology of superstrings with/without pure spinors;Grassi;Adv. Theor. Math. Phys.,2003
4. A new first class algebra, homological perturbation and extension of pure spinor formalism for superstring;Aisaka;J. High Energy Phys.,2003
5. Operator mapping between RNS and extended pure spinor formalisms for superstring;Aisaka;J. High Energy Phys.,2003