Ever-sporting Double Stocks (Matthiola)
A South Briton: On Raising Double Stocks (1842)
Gulielma: Double Blossomed Stocks, &c. (1854)
Johnson: Old Seeds of Stocks (1868)
Gardeners Chronicle: Double-Flowered Stocks (1888)
Henslow: Origin of Species in Nature (1898)
Rudolph: Old Seeds of Stocks (1903)
Henslow: Metamorphoses of Inflorescences and flowers (1904/5)
de Vries: Double-flowered Stocks (1906)
Frost: Somatic segregation in Matthiola annua (1921)
Gardeners Chronicle: Old Seeds of Stocks (1921)
Fisher: Selection in Ever-sporting Stocks (1933)
Emsweller, et al: Double-flowered Stocks (1937)