. ▁ 1 9 9 4 . ▁Trans form ational ▁grammar : ▁From ▁rules ▁to ▁principles ▁and ▁parameters . ▁London : ▁Edward ▁Arnold . ▁van ▁Ri ems d ijk , ▁H . ▁and ▁E . ▁Williams . ▁ 1 9 8 6 . ▁Introduction ▁to ▁the ▁theory ▁of ▁grammar . ▁Cambridge , ▁MA : ▁The ▁M IT ▁Press . ▁van ▁Val in , ▁R . ▁ 2 0 0 1 . ▁An ▁introduction ▁to ▁syntax . ▁Cambridge , ▁UK : ▁Cambridge ▁University ▁Press . ▁ ▁Category : G ram mar ▁Category : Syntax ▁Category : Sem antics <0x0A> </s> ▁NGC ▁ 4 3 9 ▁is ▁a ▁l entic ular ▁galax y ▁of ▁type ▁S AB 0 ^ -( rs )? ▁located ▁in ▁the ▁const ell ation ▁S cul pt or . ▁It ▁was ▁discovered ▁on ▁September ▁ 2 7 , ▁ 1 8 3 4 ▁by ▁John ▁H ersch el . ▁It ▁was ▁described ▁by ▁Dre yer ▁as ▁" pre tty ▁bright , ▁small , ▁round , ▁gradually ▁br ighter ▁middle ." ▁ ▁References ▁▁ 0 4 3 9 ▁ 1 8 3 4 0 9 2 7 ▁Category : S cul pt or ▁( const ell ation ) ▁Category : L entic ular ▁galaxies <0x0A> </s> ▁Physics ▁and ▁Chem istry ▁of ▁Min er als ▁is ▁a ▁peer - review ed ▁scientific ▁journal ▁published ▁month ly ▁by ▁Springer ▁Science + Bus iness ▁Media . ▁The ▁journal ▁publish es ▁articles ▁and ▁short ▁communic ations ▁on ▁min er als ▁or ▁sol ids ▁related ▁to ▁min