Geodesic
Differential calculus for $q$-deformed twistors
Teoretičeskaâ i matematičeskaâ fizika, Tome 115 (1998) no. 2, pp. 177-184

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A “hort” version of the $q$-deformed differential calculus on the light cone using the twistor representation is proposed. The commutation relations between coordinates and momenta are obtained. The quasi-classical limit gives an exact shape for the off-shell shifting. 
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     author = {V. P. Akulov and S. A. Duplij and V. V. Chitov},
     title = {Differential calculus for $q$-deformed twistors},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {177--184},
     publisher = {mathdoc},
     volume = {115},
     number = {2},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1998_115_2_a1/}
}
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V. P. Akulov; S. A. Duplij; V. V. Chitov. Differential calculus for $q$-deformed twistors. Teoretičeskaâ i matematičeskaâ fizika, Tome 115 (1998) no. 2, pp. 177-184. http://geodesic.mathdoc.fr/item/TMF_1998_115_2_a1/