Série I, tomo IV (Paris, 1864), pp. 164-176.
      427 COLEBROOKE. p. 72
      428 HANKEL, p. 210.
      429 Agrimensoren, p. 40 e nota 77.
      430 HANKEL., pp. 212-215.
      431 Agrimensoren, p. 42.
      432 HANKEL., pp. 211.
      433 COLEBROOKE, p. 295: «The product of half the sides and countersides is the grossarea of a triangle and tetragon».
      434 MARTIN (LOC. CIT. NOTA 28), P. 176: «DANS CE QUI RESTE DE CES COMPILATIOM GRECQUES ON REMARQUE QUELQUES ESPRESSIONS BIZARRES ET DES PROPOSITIONS INEXACTES, QUI NE VIENNENT PAS D’HERON, MAIS SANS DOUTE DES ARPENTEURS EGYPTIENS. TOUT CELA SE RETROUVE DANS LES COMPILATIONS DES BRAHMAGUPTA ET DES INDIENS POSTERIEURS».
      435 COLEBROOKE, P. 312: «THE AREA DEDUCED FROM THE MOIETIES OF THE SUMS OF THE SIDES AT TOP AND BOTTOM, BRING MULTIPLIED BY THE DEPTH, IS THE PRATICAL MEASURE OF THE CONTENT. HALF THE SUM OF THE AREAS AT TOP AND BOTTOM, MULTIPLIED BY THE DEPTH, GIVES THE GROSS CONTENT».
      436 COLEBROOKE, P, 317, SECTION IX, MEASURE BY SHADOW.
      437 BURNELL, Catalogue of a collection of Sanskrit manuscripts, p. 29.
      438 The Çulvasŕtras by G. Thibaut. Ph. D. Anglo-Sanscrit professor. Benaras College. Reprinted from the Journal of the Asiatic Society of Bengal. Part. I, for 1875. Citiamo questo scritto col nome: Thibaut.
      439 THIBAUT, p. 5: «The area of every chiti, whatever its shape may be - falcon with curved wings, whell, praüga, tortoise, etc, - had to he equal to 7˝ square purushas. On the when hand, when at the second construction of the altar one square purusha to be added to the 7 ˝ constituting the first chiti, and when for the third construction 2 square purushas more were required, the shape of the whole, the relative proportions of the single parts had to remain unchanged».