↑ Thompson, Ian (2013). Cornish Milestones. Twelveheads Press. ISBN9780906294789.
Baines, Phil; Haslam, Andrew (2005), Type and Typography, Laurence King Publishing, p. 51, ISBN9781856694377, สืบค้นเมื่อ 23 May 2014 In British Standards Classification of Typefaces (BS 2961:1967), the following are defined: Grotesque: Lineale typefaces with 19th-century origins. There is some contrast in thickness of strokes. They have squareness of curve, and curling close-set jaws. The R usually has a curled leg and the G is spurred. The ends of the curved strokes are usually oblique. Examples include the Stephenson Blake Grotesques, Condensed Sans No. 7, Monotype Headline Bold. Neo-grotesque: Lineale typefaces derived from the grotesque. They have less stroke contrast and are more regular in design. The jaws are more open than in the true grotesque and the g is often open-tailed. The ends of the curved strokes are usually horizontal. Examples include Edel/Wotan, Univers, Helvetica. Humanist: Lineale typefaces based on the proportions of inscriptional Roman capitals and Humanist or Garalde lower-case, rather than on early grotesques. They have some stroke contrast, with two-storey a and g. Examples include Optima, Gill Sans, Pascal. Geometric: Lineale typefaces constructed on simple geometric shapes, circle or rectangle. Usually monoline, and often with single-storey a. Examples include Futura, Erbar, Eurostile.
