Check-lists
* List of countries might not be complete
Links and literature
[1] Rintanen, T. (1996): Changes in the flora and vegetation of 113 Finnish lakes during 40 years, Ann. Bot. Fennici 33: 101–122 [as Subularia aquatica]
Rintanen, T. (1996): Changes in the flora and vegetation of 113 Finnish lakes during 40 years, Ann. Bot. Fennici 33: 101–122 [as Subularia aquatica]