[1] G.  Ciucar: On the syntactic complexity of Galiukschov semicontextual languages. Rev. Roumaine Lingv. CLTA 25 (1988), 1,23 - 28.
[2] J. Dassow: 
Pure grammars with regulated rewriting. Rev. Roumaine Math. Pures Appl. 31 (1986), 8, 657-666. 
MR 0872047 | 
Zbl 0617.68065[3] J. Dassow, Gh. Páun: 
Regulated Rewriting in Formal Language Theory. Akademie Verlag, Berlin 1989. 
MR 1067543[4] B. S. Galiukschov: Semicontextual grammars (in Russian). Mat. logica i mat. lingv. Kalinin Univ. 1981, 38-50.
[5] S. Marcus: 
Contextual grammars. Rev. Roumaine Math. Pures Appl. 14 (1969), 10, 1525 to 1534. 
MR 0262026 | 
Zbl 0193.32401[6] Gh. Páun: 
On semicontextual grammars. Bull. Math. Soc. Sci. Math. R. S. Roumanie (N. S.) 28 (76) (1984), 1, 63-68. 
MR 0744752[7] Gh. Páun: 
Two theorems about Galiukschov semicontextual languages. Kybernetika 21 (1985), 5,360-365. 
MR 0818888[8] C.C.Squier: 
Semicontextual grammars: an example. Bull. Math. Sci. Math. R. S. Roumanie (N. S.) 32 (80) (1988), 2, 167-170. 
MR 0984174 | 
Zbl 0657.68077