. "On the analytical representation of direction : an attempt applied chiefly to solving plane and spherical polygons 1797" . . "Biography"@en . "Biography" . . . . . "On the analytical representation of direction : an attempt applied chiefly to solving plane and spherical polygons : 1797" . . . . . . . . . . . . . "On the analytical representation of direction an attempt applied chiefly to solving plane and spherical polygons, 1797"@en . . . . . . "On the analytical representation of direction : an attempt applied chiefly to solving plane and spherical polygons, 1797"@en . "On the analytical representation of direction : an attempt applied chiefly to solving plane and spherical polygons, 1797" . . . . . . . . . . . . . . . . . . . . "History"@en . . "History" . . "On the analytical representation of direction : an attempt applied chiefly to solving plane and spherical polygons ; 1797" . . . . . . . . . . . . . . "Analyse vectorielle." . . "Nombres complexes Méthodes graphiques." . . "Liczby zespolone." . . "Trigonométrie sphérique." . . "Nombres complexos." . . "Vectoren (wiskunde)" . . "Complex numbers." . . "Om directionens analytiske betegning." . . "Polygon." . . "Análisis vectorial Obras anteriores a 1800." . . "Números complejos Historia." . . . . "Matematicieni." . . "Komplexe Ebene." . . "Caspar Wessel." . . "Geodäsie Geschichte 18. Jh Text." . . "Vektör analizi." . . "Fysik matematik." . . "Vector analysis." . .